English – Grammar: Time Clauses When While Before After Until As Soon As – 3rd Year Middle School – Algerian Curriculum

Time Clauses: When, While, Before, After, Until, As Soon As

Time clauses are used to show the time relationship between two actions.

Conjunctions

• When: When I arrived, she was sleeping.
• While: While I was studying, my brother was watching TV.
• Before: Before you leave, close the window.
• After: After I finish work, I will go home.
• Until: Wait here until I come back.
• As soon as: As soon as he arrived, we started eating.

Rules

When the time clause refers to the future, use present simple (not will).
When she comes (NOT: when she will come), I will tell her.

Exercises

1. Complete: I will call you as soon as I ___ (arrive). She waited until he ___ (come).