类别 全部 - perfect - verbs - uses - irregular

作者:jhon lopez 13 年以前

298

unit 2 - 1

The present perfect tense is essential in English and is often used to describe actions that have occurred at an unspecified time before now. It frequently incorporates contractions like "

unit 2 - 1

unit 2 - 1

additional uses

before
already
yet
ever
always
since
for

Perfect present

contractions
've eaten
Irregular verbs
been

eaten

gone

had

heard