Explanation

Several words are sometimes used as adverbs or sometimes used as prepositions.

A word is a preposition when it governs a noun or a pronoun, It is an adverb when it does not.

The wheel came off. “Off” is an adverb here

He jumped off the train. “Off” is a preposition here

Explanation

 Twice is used as Adverb

An adverb is a part of speech that provides greater description to a verb, adjective or another adverb.

Explanation

Here the word in is an Adverb because it is given in the end.

Explanation

I could not get a seat in the first row though I came early.

اگرچہ میں سویرا آیا پھر بھی پہلی قطار میں سیٹ حاصل نہ کرسکا۔

Explanation

Then is used here as adverb

Explanation

Several words are sometimes used as adverbs or sometimes used as prepositions.

A word is a preposition when it governs a noun or a pronoun, It is an adverb when it does not.

He moved on. “On” is an adverb here

Keep your books on the table. “On” is a preposition here

Explanation

Several words are sometimes used as adverbs or sometimes used as prepositions.

A word is a preposition when it governs a noun or a pronoun, It is an adverb when it does not.

Do you want to come in? “In” is an adverb here

Is he in his room? “In” is a preposition here

Explanation

Several words are sometimes used as adverbs or sometimes used as prepositions.

A word is a preposition when it governs a noun or a pronoun, It is an adverb when it does not.

Don’t run around.  “Around” is an adverb here

Don’t loiter around the street. “Around” is a preposition here

Explanation

Suppositional sentences having phrases like “I wish”, He/She wishes”, As if”, As though”, and indicating some unfulfilled wish/desire take simple past.

Explanation

Because down is given at the last of the sentence.