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GUIA DE EXÁMEN.

TIME CLASUES WHEN/ WHILE
• DIFFERENCES:
• Both when and while can be used to talk about actions or situations that take place at the same time.

1 Backgrounds
We can use both words to introduce a longer 'background' action or situation, which is/was going on when something else happens/happened.
|[p|[|Somebody broke into the house whenthey were playing cards.(CONTINUOUS) |
|ic|p| |
|] |i| |
| |c||
| |]| |
|[p|[|While they were playing cards, somebody broke into the house. (SIMPLE) |
|ic|p||
|] |i| |
| |c| |
| |]| |Note that when and while clauses can go at the beginning or end of sentences.
2 Simultaneous long actions
We usually use while to say that two longer actions or situations go / went on at the same time.
|[p|[|While you were reading the paper, I was working. |
|ic|p| |
|] |i||
| |c| |
| |]| |


If we are talking about ages and periods of life, we use when:
|[p|[|When I was a child we lived in London (NOT While I was a child …) |
|ic|p||
|] |i| |
| |c| |
| |]||
|[p|[|His parents died when he was twelve (NOT … while he was twelve) |
|ic|p| |
|] |i| |
| |c||
| |]| |


3 Simultaneous short actions
We can use (just) when to say that two short actions or events happen / happened at the same time:
|[p|[|I thought of it (just) when you opened your mouth. |
|ic|p||
|] |i| |
| |c| |
| |]| |


While is not possible in this situation.
4 Reduced clauses
It is often...
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