The verb be

I am trying to solve this grammar problem, please help me.

Q1. The police are/were looking for the escaped criminal.
I there any other answer, and why we have to use are / were I need an explanation please.

Q2. Some of the light from the kitchen is / was shining in my room.
How should I explain to have this answer, is this a correct answer.

Q3. Physics is / was (being) taught by Dr. Roberts this term.
How should I explain to have this answer, is this a correct answer.

Thank you

Tingau

The police are looking… present tense. They are looking now.
The police were looking… past tense. They are not looking any more.

is shining… present tense. It is doing so now.
was shining… past tense. It is not doing so any more.

Physics is taught by Dr. Roberts this term - present tense as above.
Physics was taught by Dr. Roberts this term. - past tense. It must be the end of term!

Hi Beeesneees,
If a person has worked, performed really well and has succeeded in his career, what idiomatic expressions can we use with that contain “himself”?

You mean like ‘he has excelled himself’? / ‘he has done well for himself’?
It’s quite a general request. Off the top of my head I can’t think of any idiomatic expressions that include ‘himself’. I’ll have to give it some thought.

Hi Beeesneees,
If I say: “He acquitted himself well”. In which situation is it suitable?
And 1 more question:
from: “He returned to his hometown when the war ended”.
transform into: “He didnt return to his hometown until the war ended” or “He didnt return to his hometown until the war had ended”?
Thanks dear teacher!