Jf Kennedy was a senator before he -- president in 1960. Has elected/was electing/was elected/elected

Question

has elected is right answer bc of action in the past ya

Answer 1

He was elected...

Answer 2

sorry but was+ing form,,why we using that?thanks

Answer 3

Because of "was" in the first clause, the second clause also must have a past tense form. The -ing ending is used for present tense forms.

Bobpursley is right -- "was elected"