状语从句的省略形式?
要同时满足以下三个要求：
1.带有状语从句的复合句.
2.状语从句的主语和主句的主语是一样,或者状语从句的主语是it.
3.状语从句谓语含有be动词的
就可以把状语从句的主语和be动词省略.
e.g.:When she was still a student,she played roles in many plays.→ When still a student,she played roles in many plays.
She won many prizes while she was acting in famous film.→ She won many prizes whil acting in famous films.
when she was asked about hes the secret of her success,she said the she owes much to her family.→ when asked about hes the secret of her success,she said the she owes much to her family.
you can plant trees where it is possible.→you can plant trees where possible.