Explanation

“Since” and “for” are primarily used with the Present Perfect and Present Perfect Continuous tenses 

Present Perfect Simple

Structure: Subject + have/has + past participle (V3) + for/since + time expression.

Present Perfect Continuous (Progressive)

Structure: Subject + have/has + been + verb-ing + for/since + time expression.

Explanation

Simple Present tense is used for scheduled or fixed future events.

Example: Timetables, programs, or routines are expressed in simple present.

Explanation

The relative pronoun is who.

...

A relative pronoun is a word that is used to connect an independent clause to a dependent clause.

The most common relative pronouns are:

 who,

whom,

whose,

which, 

that.

..

Explanation

It was raining heavily yesterday, so they did not go out.

کل موسلا دھار بارش ہو رہی تھی اس لیے وہ باہر نہیں نکلے۔

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"did not go" effectively communicates that they remained indoors because of the rain.

Explanation

On March 7, 1876, Graham Bell invent the telephone.

Graham Bell made the first-ever telephone call to his partner, Thomas Watson.

while

In 1880 the first phone book was published

Alexander Graham Bell demonstrated the telephone to Queen Victoria in 1878

ND16-8-2023