`1`/ When does your grandfather usually read newspapers?

He usually reads newspapers in every morning

`2`/ How often do the teacher and students do experiments?

They do experiments every Monday.

`3`/ What do the boys often do after school?

They often play soccer at the break time.

`4`/ What time do these old people usually have a walk?

They usually have a walk at 6 am at the park.

`5`/What time does David often listen to music?

He often listens to music at 4 pm.

Công thức thì present simple:

+ ) S + ( alway, usually,sometime,..) + v infinite / s or es + O

- ) S + dont / doesn't + v infinite + O

? ) Do / does + S + v infinite + O?