Explanation

Before & Within

Before = point of time

Within = period of time

Please go there before Friday.

Finish it within two days means اس کو دو دنوں میں مکمل کرو

Explanation

He is ignorant to what he pretends to know.

If you are an expert, let us know more details about this question please

Explanation

Generally familiar is followed by with.

With is a preposition here.

He is familiar with me وہ مجھ سے واقف ہے

Explanation

• The sentence should read: "The package arrived before the expected delivery date."
• This implies that the package arrived earlier than the date that was anticipated or scheduled.

Explanation

Explanation

“To” should not be used with “Advise, ask, beg, tell, command, encourage, request, inform, thank, welcome, warn, forbid, order, remind, congratulate, compliment”

He advised me to work hard.

Explanation

Prepositions are words that are used to show relation of a noun to another element (noun/adjective/verb) in the sentence.

Prepositions of Agency or Instrumentality are used to link a person or thing to the action/activity that it does.

Explanation

We generally use preposition By before transports like by bus, by car, by air etc. 

Explanation

Generally At is used after laugh.

Laugh is a verb.

Explanation

We use "sorry for" to express sympathy toward someone.

Example: She was sorry for the injured dog.