Woodgroves responses to 2 Club uses the same response 2H/2S/3C/3D as a normal 2C opening.
The big difference in this 2C system is the 2D and 2NT response. In ordinary 2C it is normal to use 2NT as a ballanced hand with at least 6HCP, but this response take away a lot of biddingspace and makes it difficult for the opening hand ro show his hand.
It is better to use 2D in stead of 2NT. Those negative hands (0-5) are also responded with 2D and the respond shows:
- A negativw hand with 0-5 HCP, OR
- 6 HCP+ without a bidable suit.

As we will se the responder will have no problem showing hand later.

2NT/3H/3S/3NT show a 2 suited hand were one of the suit may be "lost" in a natural auction with an ordinary 2C system.

Response to 2C
2D : 0-5 HCP or 6 HCP+ with no bidable suit.
 All other responses shows 6+HCP
2H : 5+Heart.
2S : 5+Spades
2NT : At least 5-4 in the minor suits. No 4 card major suit.
3C : 5+Clubs. If the suit is only 5 card, the suit is good (Min HJxxx), and there should not be a 4 card side suit in a major suit. Then it's better to bid 2D first.
3D : 5+Diamonds. If the suit is only 5 card, the suit is good (Min HJxxx), and there should not be a 4 card side suit in a major suit. Then it's better to bid 2D first.
3H : At least 5-5 in Heart & Clubs. With 6 Heart the suit should be poor.
3S : At least 5-5 in Spades & Clubs. With 6 Spades the suit should be poor.
3NT : At least 5-5 in Spades & Diamonds. 6-8(9) HCP. With stronger hands the responder should bid 2S
  instead since the opener will bid Pass with no interest in S/D. With 6 Spades the suit should be poor.
 

The openers response to 2C-2D
2C    - 2D
2H  :  5+Hearts. Almost forcing.
2S  :  5+Spades. Almost forcing.
2NT  : Your favourite NT interval. (22-24 HCP if you play Woodgroves Multi)
3C  : 5+Clubs. Gameforcing. (Promise side suit if you play Woodgroves Multi)
3D  : 5+Diamonds. Gameforcing. (Promise side suit if you play Woodgroves Multi)
3H  : 5+Hearts. Gameforcing.
3S  : 5+Spades. Gameforcing.
3NT  : 25-27 HCP. Balanced hand. (8 ½ - 10 playing tricks unbalanced hand if you play W.M.)
4H  : Long heart suit with playing strength, not honour strength.
4S  : Long spade suit with playing strength, not honour strength.

Further bids to 2C-2D
2C    - 2D
2H    - Pass : Only with 0-2(3) HCP and poor heart support.
2S/3C/3D: Natural. 3-5 HCP.
2NT : 6 HCP+
3H : 0-3 HCP. Heart support.
3S/4C/4D: 3-5 HCP. Splinter bid. 4 card heart support.
3NT : 3-5 HCP. Heart support with a Ace/King + some other values (ex. long side suit)
4H : 3-5 HCP with no cue-bid.

2C    - 2D
2H    - 2NT
3C/3D -  3H : Slaminvitational. Heart support.
 3D/3S : Something in the suit bid. NT interess
 3NT : To play.
 4C/4D : Slaminvitational if openers second suit. 4C after 3D is cue-bid.
 4NT : Slaminvitational. ca. 9-11 HCP

3H    -  3S : No spadestopper. NT interested.
 3NT : To play.
 4C/4D : Cue.
 4NT : Slaminvitational. ca. 9-11 HCP

3S    - 3NT : To play.
 4C/4D : Cue-Bid. (With heart support)
 4H/4S : To play.
 4NT : RKC-Blackwood. With spades as trump.

3NT    -  4C/4D/4H: Cue-Bid. (With heart support)
 4NT : Slaminvitational. ca. 9-11 HCP
 

2C    - 2D
2S    -  The responses is analogue to the 2H rebid from the opener.

2C    - 2D
2S     -  2NT
3H    - 3S : Slaminvitational.
 4C/4D : Cue-bid. (Heart support)
 

2C    -  2D
2NT  -  : Your favourite strong NT system.  (Look at Woodgroves slamtry after strong 2NT)
 

2C    - 2D
3C    - 3D : Ask if responder has a side suit. (Which side suit if W.M.)
3H  : Sidesuit in heart.
3S  : Sidesuit in Spade.
3NT  : No side suit. (Diamond side suit if W.M.)
4C  : Very good cards with no side suit. At least 10 playing tricks.
         - 3H : Something in heart. Cue-Bid or heartstopper.
         - 3S : Something in spades. Cue-Bid or spadestopper.
         -  3NT : Something in both major suits. Not slaminterest in club.
         - 4C : Weak unbalanced hand with 3(4)+ in club.
 

2C    - 2D
3D    - 3H : Ask if responder has a side suit. (Which side suit if W.M.)
3S  : Sidesuit in Spade.
3NT  : Sidesuit in Heart.
4C  : Sidesuit in Club. At least 6-4.
         - 3S : Something in spades. Cue-Bid or spadestopper.
         -  3NT : Something in heart. Heartstopper.
         - 4C : Cue-Bid. Diamond support.
         - 4D : Weak unbalanced hand with 3(4)+ in diamond.
 

Further bids after the responders positive reply.

2C    - 2H
2S/3C/3D : Natural. 5+card
2NT  : Ask responder to show his card. Denies a 6+card suit.
3H  : Slam invitational. Ask for cue-bid.
3S/4C/4D : Splinter.
3NT  : RKC-Blackwood.
4S  : Minimum. Long selfplaying spade suit. The lack of strengths are compensated by playing
  tricks.

2C    - 2S
Further bids are analogue to 2C-2H

2C    - 2NT
3C  : Slaminvitational. 4+Clubs.
Now you can bid suits with strength at the 3-level and Cue-Bid at the 4-level. 3NT from the opener shows interests to play in NT if the responder has nothing extra.
3D  : Slaminvitational. 4+Diamonds.
Now you can bid suits with strength at the 3-level and Cue-Bid at the 4-level. 3NT from the opener shows interests to play in NT if the responder has nothing extra.
3H  : 5+Heart.
  The responders further bids:
  - 3S : Short heart and no spadestopper.
  - 3NT : Short heart and something in spades.
  - 4C : At least 5-5 in the minor suits. Extra strength.
     The opener bids 4NT: To play, 4D: accept Diamond, and Cue 4H/4S: accept Club.
  - 4D : Slamtry in heart. NB!
  - 4H : To play. 2-3 hearts. No extra strength.
  - 4S : Void.
 - 4NT : Slaminvitational.  (The Opener Pass with minimum strength or response to 4NT as
  Blackwood with extra values.
3S  : 5+Spades.
  The responders further bids:
  - 3NT : Short spade.
  - 4C : At least 5-5 in the minor suits. Extra strength.
     The opener bids 4NT: To play, 4D: accept Diamond, and Cue 4H/4S: accept Club.
  - 4D : Slamtry in Spades. NB!
  - 4H : Void.
  - 4S : To play. 2-3 Spades. No extra strength.
 - 4NT : Slaminvitational.  (The Opener Pass with minimum strenght or response to 4NT as
  Blackwood with extra values.
3NT  : 3-3 or 3-2 in the minor suit. No extra strength.
  The responders further bids:
  4C : 5 Clubs. Extra values.
   The openers bids 4NT: No interest , 4H/4S: Cue. Accept Clubs ,
   4D: 3 Diamonds. (Now the responder may Cue to accept or 4NT to decline.)
  4D : 5 Diamonds - 4 Diamonds. Extra Values.
   The openers bids 4NT: No interest , 4H/4S: Cue. Accept Diamonds ,
4C  : 4+Clubs. Demands a cue bid from partner. After Cue-Bid, 4S/4N from the opener is RKCB.
With no cue-bids, the responder bids:
   - 4NT: Not Ace/King in Clubs.
   - 5C : Ace / King in Club.
   - 5D : Ace + King in Club.
   - 5H . AKQ in club.
 4D  : 4+Diamonds. Demands a cue bid from partner. After Cue-Bid, 4NT is RKCB.
With no cue-bids, the responder bids:

2C    -  3C
3D  : 5+Diamond.
  The responders further bids.
  - 3H : Heart stopper / Cue-bid with diamond support.
  - 3S : Spade stopper / Cue-bid with diamond support.
  - 3NT : To play.
  - 4C : 6+Club. Slam invitational. (Now the opener may Cue to accept or 4NT to decline.)
  - 4D : Diamond support. Unbalanced hand.
  - 4H/4H : Splinterbid.
  - 4NT : Slam invitational. (The opener pass with minimum, or answer to Blackwood if Max.)
3H  : 5+Heart.
  The responders further bids.
  - 3S : No spade stopper.
  - 3NT : Spade stopper.
  - 4C : 6+Club. Slam invitational. (Now the opener may Cue to accept or 4NT to decline.)
  - 4D : Heart support. Extra strength.
  - 4H : Heart support.
  - 4NT : Slam invitational. (The opener pass with minimum, or answer to Blackwood if Max.)
3S  : 5+Spades.
  The responders further bids.
  - 3NT : No spade interest.
  - 4C : 6+Club. Slam invitational. (Now the opener may Cue to accept or 4NT to decline.)
  - 4D/4H : Cue-Bid. Spade support. Extra strength.
  - 4S : Spade support. Extra strength.
  - 4NT : Slam invitational. (The opener pass with minimum, or answer to Blackwood if Max.)
3NT  : To play.
  - 4C : 6+Club. Slam invitational. (Now the opener may Cue to accept or 4NT to decline.)
  - 4D/4H/4S: Cue-Bid. Strong slaminterest in Clubs.
4C  : 3+Clubs. Slaminvitational. (Now the Responder may Cue to accept or 4NT to decline.)
4H  : Long heart suit with playing strength, not honour strength.
4S  : Long spade suit with playing strength, not honour strength.
 

2C    -  3D
3H  : 5+Heart.
  The responders further bids.
  - 3S : No spade stopper.
  - 3NT : Spade stopper.
  - 4C : Cue-Bid.
  - 4D : 6+Diamond. Slam invitational. (Now the opener may Cue to accept or 4NT to
  decline.)
  - 4H : Heart support.
  - 4S : Cue-Bid.
  - 4NT : Slam invitational. (The opener pass with minimum, or answer to Blackwood if Max.)
3S  : 5+Spades.
  The responders further bids.
  - 3NT : To play.
  - 4C : Cue-bid.
  - 4D : 6+Diamond. Slam invitational. (Now the opener may Cue to accept or 4NT to
  decline.)
  - 4H : Cue-Bid.
  - 4S : Heart support.
  - 4NT : Slam invitational. (The opener pass with minimum, or answer to Blackwood if Max.)
3NT  : To play.
  - 4D : 6+Diamond. Slam invitational. (Now the opener may Cue to accept or 4NT to
 decline.)
  - 4C/4H/4S: Cue-Bid. Strong slaminterest in Diamond.
4D  : 3+Diamonds. Slaminvitational. (Now the opener may Cue to accept or 4NT to decline.)
4H  : Long heart suit with playing strength, not honour strength.
4S  : Long spade suit with playing strength, not honour strength.
 

2C    - 3H
3S  : (5)6+ Spades.
  The responders further bids.
  - 3NT : Shows no interest for spades and no extra strength.
  - 4C : Extra strength. (Now the opener may Cue to accept or 4NT to decline.)
  - 4D : Spade support. Extra strength.
  - 4S : Spade support.
3NT  : No interest for Heart or Club. No extra strength.
  The responders further bids.
  - 4C : Extra strength. (Now the opener may Cue to accept or 4NT to decline.)
4C  : 3+Clubs. Demands a cue bid from partner. After Cue-Bid, 4S/4N from the opener is RKCB.
With no cue-bids, the responder bids:
   - 4NT: Not Ace/King in Clubs.
   - 5C : Ace / King in Club.
   - 5D : Ace + King in Club.
   - 5H . AKQ in club.
4D  : 6+Diamonds. (Now the responder may Cue to accept or 4NT to decline.)
4H  : Heart support. No extra strength.
4S  : RKCB. Club support.
4NT  : RKCB. Heart support.
 

2C    - 3S
3NT  : No interest for Spades or Club. No extra strength.
  The responders further bids.
  - 4C : Extra strength. (Now the opener may Cue to accept or 4NT to decline.)
4C  : 3+Clubs. Demands a cue bid from partner. After Cue-Bid, 4S/4N from the opener is RKCB.
With no cue-bids, the responder bids:
   - 4NT: Not Ace/King in Clubs.
   - 5C : Ace / King in Club.
   - 5D : Ace + King in Club.
   - 5H . AKQ in club.
4D  : 6+Diamonds. (Now the responder may Cue to accept or 4NT to decline.)
4H  : To play. Self playing heart suit.
4S  : Heart support. No extra strength.
4NT  : RKCB. Spade support.
 
2C    - 3NT
Pass  : No interest for Spades or Diamonds. No extra strength.
  The responders further bids.
  - 4C : Extra strength. Cue in Club. The response is analogue to 4D.
  - 4D : Extra strength. (Now the opener may Cue to accept or 4NT to decline.)
4C  : 6+Clubs. (Now the responder may Cue to accept or 4NT to decline.)
4D  : 3+Diamonds. Demands a cue bid from partner. After C-B, 4S/4N from the opener is RKCB.
With no cue-bids, the responder bids:
   - 4NT: Not Ace/King in Diamonds.
   - 5C : Ace / King in Diamonds.
   - 5D : Ace + King in Diamonds.
   - 5H . AKQ in Diamonds.
4H  : To play. Self playing heart suit.
4S  : Spade support. No extra strength.
4NT  : RKCB. Spade support.