Написать предложение в этих формах : present simple, future simple, present continuous, past continuous, future continuous, present perfect, past perfect, future perfect . вот предложение: there was a mistake in his test .

There is a mistake in his test. Present Simple
There will be a mistake in his test.Future Simple
There has been  a mistake in his test.Present Perfect
There had been a mistake in his test.Past Perfect
There will have been a mistake in his test. Future Perfect

Невозможно преобразовать данное предложение в present continuous, past continuous, future continuous