Explain the concept of 'relative clauses of time' and provide examples.

Relative clauses of time are a type of subordinate clause that provide additional information about the time at which an action or event occurs in relation to the main clause. These clauses are introduced by relative pronouns such as "when," "while," "after," "before," "since," "until," "as," and "whenever." They help to clarify the temporal relationship between different parts of a sentence.

Here are some examples of relative clauses of time:

1. I will meet you after I finish work.
- In this example, the relative clause "after I finish work" indicates the time at which the action of meeting will occur, relative to the main clause "I will meet you."

2. She always sings when she takes a shower.
- The relative clause "when she takes a shower" specifies the time during which the action of singing takes place.

3. The students were studying until midnight.
- Here, the relative clause "until midnight" indicates the time limit until which the action of studying continued.

4. He left before the movie ended.
- The relative clause "before the movie ended" provides information about the time at which the action of leaving occurred, relative to the main clause "He left."

5. We have been friends since we were children.
- In this example, the relative clause "since we were children" denotes the time period during which the action of being friends has been ongoing.

6. Whenever it rains, I stay indoors.
- The relative clause "whenever it rains" expresses the time condition under which the action of staying indoors takes place.

Relative clauses of time are essential in providing context and specifying the temporal relationship between different events or actions within a sentence. They help to create a more detailed and coherent narrative by indicating when certain actions occur.