Explanation

This sentence belongs to Present Indefinite Tense. 

Active voice:  This footpath is used all the time

Passive voice: People use this footpath all the time.

Note: Do not need use subject in passive voice when it is understood in the sentence. 

Explanation

Could is a modal verb.

Could can be used for polite/formal request.

Could I have some more tea please?

کیا میں مزید چائے پی سکتا ہوں؟

Explanation

Here three years indicate that this sentence belongs to Present Continuous Tense. 

We use has been + ing form of verb with singular subject in this tense.

She has been nursing her youngest child for three years

Explanation

Formula of First conditional sentence: If/when + present simple >> will + infinitive

If you work in collaboration, you will make rapid progress.

اگر آپ تعاون سے کام کریں گے تو آپ تیزی سے ترقی کریں گے

Explanation

Here was cheating shows past tense.

We use second form of verb (knew) in simple sentence of Past Indefinite Tense.

The examiner knew that the candidate was cheating.

Explanation

"Worth seeing" correctly describes something valuable or interesting to look at.

The structure "a site worth seeing" is grammatically correct and commonly used.

Explanation

I have never seen him after that unfortunate incident.

اس ناخوشگوار واقعے کے بعد میں نے اسے کبھی نہیں دیکھا

The phrase "I have never seen him" implies the last meeting was before a specific point in time.

"After" fits best to indicate that the incident marks the point since which there has been no meeting.

Explanation

"Since" is used to indicate the time from a past event up to now or another point in the past.

The sentence refers to events that occurred after the speaker left school — so "since I left the school" is correct.

Explanation

The matter is between him and me

معاملہ اس کے اور میرے درمیان ہے

"Between" is a preposition and is followed by objective pronouns.

"Him" and "me" are correct objective forms.

Explanation

"Have had" is the correct present perfect tense to show ownership continuing from the past to the present.

"Have been" requires a verb ending in -ing, which is not present here.