Conjunctions and clauses - When...

Question 1

• We write a comma (,) IF When … is at the BEGINNING

* We do the same in sentences with BEFORE / WHILE / AFTER

Answer 1

…When you’re tired, don’t drive.
Don’t drive when you’re tired.
…Helen was 25 when she got married.
When Helen got married, she was 25.

…Always look both ways before you cross the road.
Before you cross the road, always look both ways.
…While I was waiting for the bus, it began to rain.
It began to rain while I was waiting for the bus.
…He never played football again after he broke his leg.
After he broke his leg, he never played football again

Question 2

• We use THE PRESENT (I am / I go etc.) with a FUTURE MEANING after when:
• We do the same after before/while/after/until:

Answer 2

…When I get home this evening, I’m going to have a shower. (NOT When I will get home)
…I can’t talk to you now. I’ll talk to you later when I have more time.

…Please close the window BEFORE you go out. (NOT before you will go)
…Rachel is going to stay in our flat WHILE we are away.(not while we will be)
…I’ll wait here UNTIL you come back.(not until you will come back)