Prepositions of time

-We use in with parts of the day, months, years and seasons.
In (the morning, November, 2010, autum.)
-We use at whit times.
At eight o'clock.
-We use on with days.
On saturday.
We use from... to... to show the beginningand end of something.
Open from ten to eleven.

Simple Present

We use the simple present to talk about routines or habitual actions.

Form
+ Subject+verb(-es for he/she/it)
I serve the guests.
The waiter serves the guests
(except modal verbs, be, have, ...)
- Subject+don't/doesn't+base of the verb
I don't serve the guests
The waiter doesn't serve the guests
? Do/does+subject+base of the verb
Do you speak French?
Does the waitress make cocktails?
(Who buys the As every day?)

Short answers
Do you ...?
Yes, I do./No, I don't.
Does she ...?
Yes, she does./No, she doesn't.

Time expresions
They're placed at the end of the setence.
Every day.
On Sunday's/Tusday's/Thursday's/the weekend...
Every year.