i don't need __ a new dictionary because i bought this one y

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i don't need __ a new dictionary because i bought this one year ago.为什么填to buy 而不是buy?
There's a lot to do.we can't __ to waste ant time.中间为什么填afford 而不是want？

第一句：need是实意动词,因为它的否定形式用助动词don't了.
need是实义的及物动词,后面不能用动词原形的,或用不定式形式,或用分词形式,但分词形式在意思上是表示被动的.所以这题只能用to buy.

第二句,want一般不用情态动词帮助它组成否定或疑问形式,它一般只和do构成疑问或否定形式.
want本身就有一种意愿在里边了,所以一般不和情态动词连用.

i don't need __ a new dictionary because i bought this one y I need __(buy)a new dictionary. I don't have a dictionary so I should __ one __ the library I don't like your girlfriend I think you need a new one,i wa Thanks,but you needn ' t have ______.I bought a new one this there're my new 'I don't need a job,I don't need my parents, I need a new jacket.This one doesn't___the cold. 英语翻译Check Out This View；；I don’t need a loveBut there is one 单项选择（初三英语）( ) I need a new coat ; this old one doesn't ___ t I don't like your girl friend ,maybe you need a new one是哪一首歌 i have bought a new atch because my old__doesn't work. I don’t need a perfect one.I just need someone who can make