FIRST CONDITIONAL
http://www.perfect-english-grammar.com/first-conditional-exercise-1.htmlForm
if + Simple Present, will-Future
Example: If I find her address, I will send her an invitation.
The main clause can also be at the beginning of the sentence. In this case, don't use a comma.
Example: I will send her an invitation if I find her address.
Note: Main clause and / or if clause might be negative. See Simple Present und will-Future on how to form negative sentences.
Example: If I don’t see him this afternoon, I will phone him in the evening.
Use
Conditional Sentences Type I refer to the future. An action in the
future will only happen if a certain condition is fulfilled by that
time. We don't know for sure whether the condition actually will be
fulfilled or not, but the conditions seems rather realistic – so we
think it is likely to happen.
Example: If I find her address, I’ll send her an invitation.
I want to send an invitation to a friend. I just have to find her address. I am quite sure, however, that I will find it.
Example: If John has the money, he will buy a Ferrari.
I know John very well and I know that he earns a lot
of money and that he loves Ferraris. So I think it is very likely that
sooner or later he will have the money to buy a Ferrari.
Exercises
More practice
http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/1cond.htm
