✔ 最佳答案
For verbs 動詞
add s when you see he/she/it
(第三人稱)
e.g.
He plays football.
She drives the car.
It walks away.
for nouns 名詞
add s when it is a countable plural
(可數的眾數)
e.g.
an apple / 2 apples
a table / 2 tables
computer / computers
*however, there are always exceptions:
some countable nouns do not just add s
e.g.
foot >>> feet
goose >> geese
tooth >> teeth