[Regole]=Inglese: Tempi verbali, idioms, modal verbs, rules...

Present
WHY? We use the present tense to express a habit or a permanent situation, for example something you do habitually.
How to form it: you add an "s" when you use the third person singular. For the rest, the verb stays the same unless if it's irregular. In that case, you must know all the persons.

Future
WHY? We use the future to express actions that will happen, or that hasn't happened yet.

1st conditional
WHY? We use the first conditional to express a future result based on a present condition.
How to form it: If/Unless + Present Simple + Future tense
Words we can use INSTEAD OF IF OR UNLESS: when, as soon as, while, before...
Ex. (-->Condition)If i'll do all my homework, i'll constantly perfect my skills in English. (<--Result)