19.Shanghai is cold this time of year.You need _____(pack) warm clothes if you ____(go)there.
问题描述：
19.Shanghai is cold this time of year.You need _____(pack) warm clothes if you ____(go)there.
用to pack 为什么不用pack
need 在这为什么不可以作情态动词
答
在此,need不是情态动词,而是实义动词.因为情态动词表达的说话人的情感、态度和意愿,在此说话人只是在提出建议,不是在表达情、态.作为实义动词need的用法是need to do something,所以此处填 need to pack.