Question

Which sentence uses the past participle form of the verb know?

A.
The man knows his friend since kindergarten.

B.
The man had knew his friend since kindergarten.

C.
The man had known his friend since kindergarten.

D.
The man knew his friend since kindergarten.

Answer 1

It is d because even thought b also had knew  the word had makes the sentence take place in the past

Answer 2

the answer is D.The man knew his friend since kindergarten. even though B has the word knew too but it has the word had  which is also is in the past form it will have to be the man had knows his friend