Are you available tomorrow night ...

[Odessa Dawn]

Are you available tomorrow night to finalize our project? If yes, we will ring you two hours before we come. If not, can you suggest us another time?


Is that construction grammatical?

 

[emsr2d2]

Are you available tomorrow night to finalize our project? If [STRIKE]yes[/STRIKE] so, we will ring you two hours before we come. If not, can you suggest [STRIKE]us[/STRIKE] another time?

Is that construction grammatical?

See above.

 

[Odessa Dawn]

I think this is a related question. It is incorrect to say I think yes and I think no. I do not know if the same rule applies to if + yes.

 

[emsr2d2]

You can say "If yes, ..." if you follow it with "If no, ...". I prefer "If so, ..." followed by "If not, ...". The first pair are sort of shortened versions of "If your answer is yes ..." and "If your answer is no ...".