Clauses - English Grammar Today - Cambridge Dictionaries Online


from English Grammar Today

Clauses: introduction

A clause is the basic unit of grammar. Typically a main clause is made up of a subject (s) (a noun phrase) and a verb phrase (v). Sometimes the verb phrase is followed by other elements, e.g objects (o), complements (c), adjuncts (ad). These other elements are sometimes essential to complete the meaning of the clause:

[S]Sarah [V]smiled.

[S]Jo [V]doesn’t feel [C]well.

Not: Jo doesn’t feel. (well is essential because it completes the meaning of feel.)

[S]They [V]haven’t posted [O]all the invitations. (post is a transitive verb which needs an object, all the invitations)

The underlined words are not essential to complete the clause:

[S]I[V]’ll call [O]you [AD]later.

[S]All the girls [V]laughed [AD]loudly.

When we give a command, we don’t usually use a subject:

Be careful!


When we do use the subject, it is to reinforce the instruction or to make clear exactly who the speaker is talking to:

You be careful.

Main (independent) clauses and subordinate (dependent) clauses

Main (or independent) clauses can form sentences on their own. They aren’t dependent on other clauses. They are always finite (they must contain a verb which shows tense).

Subordinate (or dependent) clauses cannot form sentences on their own. They are dependent on main clauses to form sentences. They can be finite or non-finite (the main clauses are in bold; the subordinate clauses are underlined):

I didn’t go to work because I wasn’t feeling very well.

He studied violin and mathematics before taking a medical degree and doing postgraduate work in biophysics at Harvard.

She had pretty hair and must have been nice-looking when she was young.

If I tell him will he be angry?

Clauses: coordinated

We can combine clauses of the same grammatical type to form sentences using coordinating conjunctions:

[main clause]I’ll take the train and [main clause]you can take the car.

I’ll give you a call [subordinate clause]if I’m going to be late or [subordinate clause]if I’m not coming.

You can use the phone [non-finite clause]to receive calls but [non-finite clause]not to make them.

We don’t create coordinated clauses with clauses of a different grammatical type. For example we cannot coordinate a main clause and a subordinate clause:

Ten minutes passed and no one had come.

Not: Ten minutes passed and if no-one had come.

(“Clauses” from English Grammar Today © Cambridge University Press. Need grammar practice? Try English Grammar Today with Workbook.)
Add Cambridge dictionaries to your browser to your website
Word of the Day


to succeed in finishing something or reaching an aim, especially after a lot of work or effort

Word of the Day

Take the rough with the smooth (Idioms to describe dealing with problems)
Take the rough with the smooth (Idioms to describe dealing with problems)
by Kate Woodford,
October 07, 2015
Readers of this blog will know that from time to time, we focus on frequent idioms. This week, we’re looking at idioms that we use to describe the way we deal with – or fail to deal with – problems and difficult situations. Starting with the positive, if you are in a

Read More 

face training noun
face training noun
October 05, 2015
a system of facial exercises designed to tone the facial muscles and improve the skin

Read More