Question

Which sentence uses the irregular verb see correctly?

a. Mary sawed that man again yesterday.
b. I thought I seen him in the yard.
c. Sam has seen the same man in New York City.
d. When had you saw him last?

Answer 1

Sam has seen the same man in New York City.

Answer 2

C.
seen--used in perfect tenses
saw--past tense
sawed--has nothing to do with the word "see," but I think such a word exists.

Correct forms of senetences A, B, and D:
A: I thought I SAW him in the yard.
B: Mary SAW that man again yesterday.
D: When had you SEEN him last?