Explanation

we could use ‘if he were’, if the events are imagery or improbable.

‘If he were’ can be used when expressing an imaginary situation in the present that is definitely not true.  

In the given question, he behaves like a king, which is an imaginary situation 

So we have used ‘if he were’, instead of using ‘if he was’.

Explanation

“should” is used to indicate something which is probable.

Here in this case Probability of failure on not working hard.

The sentence, in this case, will be “Work hard lest you should fail”. 

Explanation

Near the historic monument, there is a bridge over the Thames River.

تاریخی یادگار کے قریب دریائے ٹیمز پر ایک پل ہے۔

The preposition "over" is used here to indicate the spatial relationship between the bridge and the Thames River.

Explanation

What are they doing does not seem to be working جو کچھ کر رہے ہیں وہ کام کرتا نظر نہیں آتا۔

Explanation

This sentence belongs to Past Perfect Continuous Tense.

Formula: Sub + had been + verb + ing + since/for + time

It had been raining since last night.

Explanation

Intrude into کہیں زبردستی گھسنا

Intrude on دخل اندازی کرنا

Intrude on is a phrasal verb.

Do not intrude on the privacy of anyone.

Explanation

See is a verb.

Second form: Saw

Third form: Seen

 Have you seen them means کیا آپ انہیں دیکھ چکے ہیں

Explanation

"For" is used to indicate the object of the search.

The sentence "I am searching for my car" means you are trying to locate your car.

Explanation

We generally use to for a direction.

To is a preposition here.

I want to go to England next year means میں اگلے سال انگلینڈ جانا چاہتا ہوں

Explanation

Scrupulous means باریک بین

everything the candidate said publicly was scrupulous.