* Formation : was / were + the (-ing) form of the verb.
* Usage : - an action which was going on during a certain time in the past.
- indicating that an action was going on at a time when another action took place.
*Words used with the tense : all (yesterday) - while - as - when - etc.
N.B.1_ WHILE and AS are followed by past continuous and the main verb in the past
simple.
WHEN is followed by past simple and the main verb in the past continuous.
N.B.2_ Some verbs are not used in the continuous form.
* Put in the correct tense of the given verb:
1- I ( read ) a book when he came in.
* 1 was reading a book when he came in.
2- The sun ( shine ) when we ( go out ).
* The sun was shining when we went out.
3- When you ( come in), I ( write ).
* When you came in, 1 was writing.
4- I ( come in ) while he ( write ).
* I came in while he was writing.
5- It ( rain ) this morning when I ( get up ).
* It was raining this morning when I got up.
6- He ( work ) all day yesterday.
* He was working all day yesterday.
7- When 1 ( arrive ) at his house, he still ( sleep ).
* When I arrived at his house, he was still sleeping.
8- The boy ( jump off ) the tram while it ( move ).
* The boy .jumped off the tram while it was moving.
9- The fire still ( burn ) at six o'clock this morning.
* The fire was still burning at six o'clock this morning.
10- He ( walk ) across the bridge when his hat ( blow off).
* He was walking across the bridge when his hat blew off.