Need的用法
Need有兩種用法,可以用做特殊動(dòng)詞,或者用做普通動(dòng)詞,二者不可兼用.
特殊動(dòng)詞need只用于疑問句和否定句,用來表示有必要嗎或沒必要.肯定式是must.
不能接名詞,只能和普通動(dòng)詞不定式5構(gòu)成合成謂語,無人稱和時(shí)間變化.
Need you go there now ?
Yes, I must . No, I needn’t.
普通動(dòng)詞need不能提前疑問也不能加not否定,含義是需要.疑問和否定要借助于特殊動(dòng)詞do. 可以接名詞做賓語.也可以跟4to do(=have to do) ,6doing 做賓語.有時(shí)間和人稱變化.跟6做賓語時(shí),其主語往往是物,主動(dòng)形式表被動(dòng)結(jié)構(gòu).
I need to use the bathroom.
Do you need to have a book ?
Yes, I do .No, I don’t need to have a book.
I need a book.
Do you need a book ?
Yes, I need a book. No, I don’t need a book.
She needs your help.
Does she need your help ?
Yes, she does. No, she doesn’t.
He needed to take a taxi,or he would be late.
Did he need to take a taxi ?
Yes, he did. No,he didn’t.
Your shoe needs mending .
Does your shoe need mending ?
Yes, it does. No,it doesn’t.