Question

the students have been taking online class ........ an hour.​

Answer 1

Answer:

For

Explanation:

Answer 2

Answer:

The students have been taking online class for an hour.

Explanation:

❀Preposition is a word placed before a noun or a pronoun to govern its relation to some preceding noun or pronoun.

Kinds of Preposition:

Prepositions are of three types :

1. Simple Prepositions

2. Compound Prepositions

3. Participial Prepositions.

Simple Prepositions

Simple prepositions are simple short words that have not been derived from any other words ; as :

at, by, down, for, from, in, of, near, on, out, over, since, through, till, to, under, up, with.