need(冇s) not,咁第3身 need to有冇s?

He need to go to school. 此句中既need又洗唔洗加s呢??? 一定要加 "s"...... 第三身單數 .......eg ..........He needs to eat ..............He needs to buy a new .........He needs money ............He needs some food .............

2010-10-14 00:09:51 補充：
1) 根據主詞改變，如：
I need some help.
He needs some help. (有 s)

(2) 配 to + infinitive ，如：
I need to do my homework.

(3) 在問句或否定句中，要加 do 字，如：
Do you need any help?
He does not need to do anything.

2010-10-14 00:10:45 補充：
(4) 不會根據主詞改動，如：
He should not leave now. (沒有 s)
He need not go so soon. (沒有 s)


(5) 配 infinitive without to ，如：
I should do my homework. (不是 I should to do my homework.)
I don't think he need go so soon. (不是 I don't think he need to go so soon.)

參考網站 http://www.bartleby.com/64/C001/037.html#NEED