To talk about place, we use the following prepositions.

In

In is used to talk about position inside large areas and in three-dimensional space.

• He is in his room.

Join the following sentences by using a relative pronoun.

Hints

• Use who and that to refer to people.
• Use which and that to refer to things.

Complete the following sentences using appropriate prepositions. Choose your answers from the options given in the brackets.

1. He has nothing to declare ………………………. (at / on) the airport.

An appositive is essentially a modifying clause from which a relative pronoun and a linking verb have been removed. Appositives are commonly used for combining ideas. In writing, we usually set them off with a pair of commas.

We have already learned that coordinating conjunctions can be used to combine two or more clauses together. They can also be used to combine other sentence elements such as subjects, verbs, objects etc. When we use a coordinating conjunction to combine two such sentence elements, no comma is required.

Some verbs and adjectives can be followed by either an –ing form or an infinitive. However, in some cases only one of these two structures is possible.

Convert the following simple sentences into complex sentences each containing an adverb clause.