Explanation

I had scarcely entered the room when the guest arrived.

جب مہمان آیا تو میں مشکل سے کمرے میں داخل ہوا تھا۔

When means "at or during the time that" (as conjunction)

When is used as a conjunction here  "someone entered the room at or during the time that".

Explanation

Explanation

Explanation

We had met before we began working together.

The sentence is in the past perfect tense ("had met")

This indicates that the action of the meeting happened before another past action. 

Explanation

The complete sentence is:
"The teacher continued me on my spelling."

The preposition "on" is used to indicate a subject or focus,

Explanation

He was born in December 12, 1990.

وہ 12 دسمبر 1990 کو پیدا ہوئے۔

For month, year, and season, we use in.

For month, year, and season, we use in.

For example in August, in 1992, in the '90s, in winter.

For date and day, we use on.

For example 5 of August, on the fifth, on Monday.

Explanation

"We use 'will purchase' to express your intent to buy something in the future if you have the money."

 The modal verb 'will' is used to express future tense,

while 'purchase' is the base form of the verb used to describe the action of buying something.

Explanation

You would have soon my garden at its best if you had been here last week.

اگر آپ پچھلے ہفتے یہاں ہوتے تو آپ کے پاس میرا باغ جلد ہی بہترین ہوتا۔

"Had been" is the correct form of the past perfect tense.

It indicating an action that occurred before another action in the past.

Using "had been" allows the sentence to logically convey that being present last week would have allowed someone to see the garden at its best.

Explanation

Did Ali go to London on the train yesterday?

کیا علی کل ٹرین میں لندن گئے تھے؟

"Did" is followed by the base form of the verb, so "Did Ali go" is correct.

Explanation