Grammar refers to the structure of language and how different words fit together. Knowing something about English grammar rules should help you to construct clear and meaningful sentences.
A main clause contains a verb and has one main idea. It can form a complete sentence. This is called a main clause.
Examples:
the cat mewed
his car broke down at the station
the girl laughed loudly
Some clauses are not complete ideas and therefore can not function as independent sentences. These are subordinate clauses and add extra information to a sentence. A sentence that includes both a main and a subordinate clause is known as a complex sentence. For example:
the cat, which was balanced on the fence, mewed
his car, described by his girlfriend as a ‘rust-bucket’, broke down at the station
the girl, whose name he could never remember, laughed loudly
Notice how the subordinate clause makes no sense on its own. It depends on the main clause to make sense.
Also notice that the subordinate clause is separated by commas.
Question
Identify the main and subordinate clauses in the following sentences:
The cat ate the food, which had been left for it.
Bex took a step towards the cliff, even though it scared her.
Johnston, who was only fifteen years old, was already a brilliant footballer.
The parts in bold are main clauses and the parts in plain text are subordinate clauses:
The cat ate the food, which had been left for it.
Bex took a step towards the cliff, even though it scared her.
Johnston, who was only fifteen years old, was already a brilliant footballer.
Notice that subordinate clauses can also be ‘embedded’ within a major clause.