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Today,we’re going to have a lesson about the time clauses

Consider the following sentence

When I go home,I will phone you

In this sentence,we have two clauses

The first clause
When I go home

The second clause

I will phone you

We call the first clause : subordinate clause because it is not complete in meaning and it contains

the conjunction " when "but we call the second clause the main clause because its meaning is complete

So, the subordinate clause always contains the conjunction

There are many conjunctions that express time like : as soon as -while-before-after-until

Exercise1 : Colour the main clause in red and the subordinate clause in blue in the following sentences

As soon as I finish my work,I’ll go home

She won’t leave until you come

My father will buy a new car before he sells the old one

After we finish the lesson,we’ll do an exercise

I will read a newspaper while I am in the bus

When he comes back,I’ll tell him