AnonymousWould you please let me know as soon as possible if you would like to attend this seminar.
Correct.
AnonymousIf you would hand me that spoon, I will/would appreciate it.
would OK, not
will.
AnonymousIf you would give me a pen,I would give you a pencil.
Just barely OK. More idiomatic with will, thus:
If you'll give me a pen, I'll give you a pencil.
AnonymousHe looks as if he is about to cry. - first conditional?
He looked as if he were going to cry.- second conditional?
I'm not aware of any classification of the
as if constructions into first, second, and third. From what I've seen, they can parallel the first, second, and third conditionals in their tense patterns, but usage is much more free. That is, they don't always conform strictly to those numbered conditional patterns. Like so many other cases, the "past" form can be borrowed into a present tense setting, thus:
He looks as if he were about to cry.
CJ