在甚麼情況下要在英文句子中加s？

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

眾數　　ＯＲ　　　名詞

ＥＧ：She goe(s) to sleep.

for example:
I eat my breakfast.
She eats her Breakfast.
在這情況...
HE SHE IT 就1定會在動詞後加S

或者..
在名詞後加S ( 數量是1或以上的)

(1)眾數
(2)以第三人稱(eg: he she it)為subject 的句子
eg: He plays piano.
She goes to school everyday.
It seems very good.

he she it need + s
name back need + s

2008-01-09 20:35:12 補充：
more than one need s

she/he/it在英文句子中加s

1以上要在英文句子中加s