с грамматикой английский): Complete the sentences using the PAST SIMPLE or the PAST CON­TINUOUS.

1. She (see) an accident while she (wait) for the train.

2. It (rain) when we (go out).

3. She (break) her arm while she (play) football.

4. John and his parents (sit) in the living room when his brother (come in). While they (talk), his mother (go) to the kitchen to get some coffee.

1. She saw an accident while she was waiting for the train.

2. It was raining  when we went out.

3. She broke her arm while she was playing football.

4. John and his parents were sitting in the living room when his brother came in.

While they were talking, his mother went to the kitchen to get some coffee.

Объяснение:

С Past Simple и Past Сontinuous все достаточно просто, стоит лишь разобраться. Само слово Сontinuous происходит от слова continue (продолжаться) т.е означает длительное действие.

when-когда. Иначе говоря, что-то долго происходило, когда другое внезапное действие прервало исходное длительное.while-в течении. "Она сломала руку, (Past Simple, долго продолжаться не может, раз-и сломала) пока играла в футбол (Past Сontinuous, ведь играла она долго, это действие прервалось)