- 相關(guān)推薦
need的用法
Need(需要) 的用法
1.Need作為實義動詞
有人稱、數(shù)和時態(tài)的.變化(在變?yōu)榉穸ň浜鸵蓡柧鋾r需借助于助動詞) (1)當(dāng)主語是人時,后可接名詞和動詞不定式,即:need sth./ need to do sth. Eg: He needs some help. It's cold outside. You need to wear more clothes. Need后跟不定式且用于否定句中時,表示“不必”,指沒義務(wù)或沒必要做某事。 Eg: You don't need to do it at once.你不必馬上做那件事情。 (2)當(dāng)主語為物時,后接名詞或v-ing. Eg: The flowers need water. 這些花需要水。The flowers need watering.這些花需要澆水。
2.need作為情態(tài)動詞 (注:情態(tài)動詞不能獨立作謂語,必須和動詞原形一起構(gòu)成謂語,即need作為情態(tài)動詞時,后面必須跟動詞原形)無人稱、數(shù)和時態(tài)的變化,常用于否定句和疑問句中。Eg: You needn't go this week.這周你不必去。
由need引導(dǎo)的一般疑問句,肯定回答一般用must,否定回答一般用needn't。Eg: -------Need I come? -------Yes, you must./ No, you needn't 注:由must引導(dǎo)的一般疑問句,肯定回答一般用must,否定回答一般用needn't或don't have to Eg: --------- Must I go now? -------- Yes, you must. No, you needn't/don't have to.
http://www.dgxbdz.com/