[straube]

I'd expect 2C-2D, 2H-3C, 3S-4S without prior discussion.

I like 2H as double negative and after 2C-2H

3H-nf
3S-4S/5H
4m-5H/4m

because you don't really need these bids for setting trump as responder has nothing to cue bid anyway.

[steve2005]

 Zelandakh, on 2014-April-22, 08:43, said:

Assuming that you and partner had not discussed such things as whether a second round minor is a double negative here and that your hand was something like 4234/4243, it would seem the logical thing to bid 2♠ now.

I would like to make an unpaid advertisement for Herbert negatives instead of cheaper minor as a double negative.

In Herbert negative the cheapest step is used as the bust, so 2♠ over 2♥ and 2N over 2♠ this means if you have as major 2-suiter with ♣ you will be able to show it naturally.

If your playing 2♣ as GF except for 2N rebids it is playable to go without a double negative and it does sound like that was the situation here. I wont hazard to guess what you bid with a zero count then

[NicebutDim]

We were playing a multi 2♦, hence a 2♣ opening is reserved for very strong hands.
We had no conventional agreements for responder to show a very weak hand.
I agree that 4♥ was not a great bid by me, but didn't know how to continue.
Can I bid 2N on a 0 count? Can I bid 2♠ with 10xxx, or does this promise a longer / stronger suit?

[ArtK78]

 NicebutDim, on 2014-April-23, 12:47, said:

We were playing a multi 2♦, hence a 2♣ opening is reserved for very strong hands.
We had no conventional agreements for responder to show a very weak hand.
I agree that 4♥ was not a great bid by me, but didn't know how to continue.
Can I bid 2N on a 0 count? Can I bid 2♠ with 10xxx, or does this promise a longer / stronger suit?

2NT on a zero count? I would not recommend it.

2♠ on Txxx? That is for you and your partner to decide.

You have to come up with some way to show a truly terrible responding hand. Many play a direct 2♥ response as 3 or less HCP (but not a K). Others use cheaper minor 2nd negative. Others don't bother using a second negative. The choice is yours.

[Zelandakh]

 NicebutDim, on 2014-April-23, 12:47, said:

Can I bid 2N on a 0 count? Can I bid 2♠ with 10xxx, or does this promise a longer / stronger suit?

Traditionally both of these are possible, neither 2NT nor 2♠ promises extra values. It seems from reading these boards that America has moved in a different direction on this and has different standards. So you might need to talk to some better players from your club to find out what the popular local methods are. As I wrote before, with a pick up partner and no agreements I would certainly continue 2♠.