First conditional is used for statements and facts which will be true, if a certain condition is met.

First conditional has the form if + present simple + will + base verb. For example:
- If it's sunny, we'll go to the beach.
- If I have time, I'll meet you at work.
- If we don't go now, we'll be late.
As with all conditionals the first conditonal has two clauses, the if clause
- "If you help us, ..."
and the main clause
- "...we'll help you.".

Either of these two clauses can come first:
- "If he gets a new job we'll move to London." - or also:
- "We'll move to London if he gets a new job."

In the first conditional will is a modal verb expressing certainty. Other modal verbs can also be used to show various degrees of certainty. For example:
- If you like Asian food, you'll love this restaurant. (There is a 100% chance you'll love the restaurant.)
- If you like Asian food, you should like this restaurant. (80%)
- If you like Asian food, you might like this restaurant. (50%)
- If you like Asian food, you probably won't like this restaurant. (20%)
- If you like Asian food, you won't like this restaurant. (0%)

-----