Types of Time Clauses

Front

When

Back

Used to indicate a specific point in time. Can be used with past, present, or future tenses. E.g., When she arrives, we’ll start.

Front

While

Back

Refers to two actions happening at the same time, usually with past continuous. E.g., While he was cooking, she was setting the table.

Front

Before

Back

Refers to an action that happens earlier than another. E.g., Finish your homework before you go out.

Front

After

Back

Refers to an action that happens later than another. E.g., We’ll eat after he arrives.

Front

Until / Till

Back

Indicates a point in time up to which something continues. E.g., Wait until I come back.

Front

As soon as

Back

Used to show one event happens immediately after another. E.g., Call me as soon as you get home.

Front

Since

Back

Refers to a starting point in time and is often used with the present perfect. E.g., I’ve been here since Monday.

Front

By the time

Back

Means 'no later than the time when…' Used to show deadlines or past completion. E.g., By the time she arrived, we had left.

Front

Whenever

Back

Refers to any time or every time something happens. E.g., Whenever I see her, she’s smiling.

Front

As

Back

Indicates two actions happening at the same time, often gradually. E.g., As I was walking, it started to rain.