Examples

Date: 2015-10-07; view: 433.

Example

I) Relative clauses with relative adverbs

GRAMMAR IN USE

1) In unit one, you did review relative clauses with relative pronouns, in this unit you will have one more chance to review relative clauses with relative adverbs.

a) The laboratory where experiments are conducted must be kept clean all the time.

b) The time when we should conduct the experiment has not been decided yet.

c) That Physics studies both universe and human being is the reason why I choose it to study for my life.

Each of the above sentences has a relative clause starting with a relative adverb:

a) whereexperiments are conducted

b) whenwe should conduct the experiment

c) whyI choose it to study for my life.

2) From the examples, it is deduced that relative adverb

a) whereis used to modify a nouns referring to a place;

b) whenis used to modify the nouns referring to time; and

c) whyis used to modify the noun reason.

3) However, there is difference among these relative adverbs in forming defining and non-defining relative clauses

3.1. Non – defining relative clauses

Whenand whereare used in non- defining relative clauses

a) You have to read the report next week, when the meeting is chair- manned by the president of our society.

b) The earth, where we are living, has always been a mystery objective for scientists.

c) Last year, when he got help from sponsors, was the most successful year for him

since the start of his study in mechanics.

3.2. Defining clause

a) Whenand whereare used in defining relative clauses, but each of these clauses

modifies a special group of nouns.

• Whenfollows the word time or other time notion as day, week, month, year.

Examples:

1. The time whenwe make the observations must be long enough.

2. The day whenI started the first lesson on Physics was very impressive.

3. 1642 is the year whenNewton, Sir Isaac was born.