Explanation

The correct phrase is "yelling at" when someone is shouting angrily toward someone.

Correct sentence: "She was yelling at her students."

Explanation

The concert was cancelled due to bad weather.

"Due to" is used to give the reason for something.

The phrase "due to bad weather" means because of bad weather.

Explanation

 "Call on" means to visit someone, especially formally.

So:

"Mr. Steward will call on you at 8.00 P.M."

مسٹر اسٹیورڈ آپ سے شام 8 بجے ملاقات کریں گے۔

Explanation

The sentence describes a past continuous action interrupted by another past action.

So:

"He was sleeping when the doorbell rang."

جب دروازے کی گھنٹی بجی، وہ سو رہا تھا۔

Explanation

 A heifer is a young female cow that has not yet borne a calf.

So, the sentence "She was as strong as a heifer" compares her strength to that of a young cow,

Which is known for being sturdy and strong.

Explanation

 In "The Man Who Kept His Heart in a Bucket" by Sonia Levitin (which this question likely references),

Gorgios proposes creating the unusual post of court acrobat, and many people oppose the idea, considering it odd or unnecessary.

Explanation

He had his breakfast at 9 o’clock.

The sentence refers to a specific time in the past ("at 9 o’clock"), so the correct tense is simple past.

"Had" is the simple past tense of "have," and it fits well with a completed past action at a specific time.

Explanation

I hope they will not have left the city before I reach there.

مجھے امید ہے کہ میرے وہاں پہنچنے سے پہلے وہ شہر چھوڑ کر نہیں گئے ہوں گے۔

The sentence talks about a future action ("before I reach there") 

Future completed action is the future perfect:

will not have + past participle

"Will not have left" shows:

A completed action in the future

That you hope they are still there when you arrive

Explanation

I buried him two days ago.

The phrase “two days ago” clearly indicates a specific time in the past, so we must use the simple past tense.

"Buried" is the simple past form of the verb "bury."

Explanation

I have been helping him for many years.

میں کئی سالوں سے اس کی مدد کر رہا ہوں۔

The sentence uses "for many years", which indicates an action that started in the past and is still continuing.

For such cases, we use the present perfect continuous tense:

$Subject+have/hasbeen+verb-ing$