Simple present

To express habits and routines, general facts, repeated actions or situations, emotions and permanent desires:

I smoke (habit); I work in London (permanence); London is a large city (general fact)

To give instructions or directions:

You walk for two hundred meters, then you turn left.

To talk about programmed, present or future events:

Your exam starts at 09.00.

To refer to the future, behind some conjunctions: after, when, before, as soon as, until:

He'll give it to you when you come next Saturday.

Verbs ending in -y : in the third person singular, the -y is replaced by -ies:

fly --> flies, cry --> cries

Exception: when a vowel precedes the -y:

play --> plays, pray --> prays

We add -es to the verbs ending in:-ss, -x, -sh, -ch:

he passes, she catches, he fixes, it pushes