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does exercise.
He
see a film.
They
sees a film.
He
do some washing.
I
She
does some washing.
climb the mountain.
I
He
climbs the mountain.
do my homework.
I
He
does his homework.
动词原形 动词三单
climb ---------------- climbs
1.直接加-s
2.特殊形式
fly --------------flies
当主语为第三人称单数时(he, she, it, 人名或物名时), 动词要变形,变成第三人称单数形式.
play ---------------- plays
see ----------------sees
do ----------------does
fly a kite
do exercise
play football