But, why is A wrong?
and why is C correct? Is and give are both verbs. Verbs together are usually with 'to' in between.
I am to write a letter.
I am write a letter. This doesn't sound right.
Basically what they do is that they give you a free gift. Is this the complete sentence of "Basically what they do is give you a free gift."?
This works for me, but version B hangs together better.I see, thanks.
But is this one, "Basically what they do is that they give you a free gift." acceptable?