be excited at 和be excited about的区别 need to do 和 need do的区别be excited at 和be excited about的区别need to do 和 need do的区别

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be excited at 和be excited about的区别 need to do 和 need do的区别be excited at 和be excited about的区别need to do 和 need do的区别
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be excited at 和be excited about的区别 need to do 和 need do的区别be excited at 和be excited about的区别need to do 和 need do的区别
be excited at 和be excited about的区别 need to do 和 need do的区别
be excited at 和be excited about的区别
need to do 和 need do的区别

be excited at 和be excited about的区别 need to do 和 need do的区别be excited at 和be excited about的区别need to do 和 need do的区别
be excited about doing sth."和"be excited to do sth."的关系与"like doing sth."和"would like to do sth."是一样的:前者都表示一般状态下的兴奋/喜欢,后者都表示做某件特定的事(或不久后就要做的事)的兴奋/喜欢
need to do need 是行为动词,而 need do 它是个情态动词.

1 need 作实义动词,肯定句 need to do;否定和疑问句需用用助动词构成。
2 need 做情态动词,后跟动词原形,即need do.。否定句needn't do;疑问句need 前置。(语言习惯,在表示否定,疑问含义时,need 用做情态动词)