COULD HAVE
WHAT IS IT FOR?
It is used hypothetically to talk about
GRAMMAR
+ COULD HAVE + VERB PAST PARTICIPLE
AFFIRMATIVE
+ COULD HAVE + PAST PARTICIPLE
NEGATIVE
+ COULDN'T HAVE + PAST PARTICIPLE
It is used hypothetically to talk about
+ COULD HAVE + VERB PAST PARTICIPLE
+ COULD HAVE + PAST PARTICIPLE
+ COULDN'T HAVE + PAST PARTICIPLE