英语的几道题1.while he __(read)the letter,he (hear)a knock

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英语的几道题
1.while he ______(read)the letter,he ____(hear)a knock at the door.
这里答案是填was reading和hear,为什么后面是用hear而不是was hearing
2.she___(drop)the tray when I____(speak)to her.
3.Bill is a hard worker.He works____than Joe.
a)hard b)more hard c)more hardly d)hardier
为什么,work动词不是用副词修饰吗
谁能提供when和while的具体用法,感激不尽!

1.翻译一下,当他正在读信时,他（）听到了敲门声
要是后面用进行时,就变成了...,他正在听到敲门声.简单来讲,就是所用形式与动作本身是否搭配.
2.when：既指时间点,也可指一段时间.引导的时间状语从句中的动词可以是终止性动词,也可以是延续性动词.说明从句的动作和主句的动作可以是同时,也可以是先后发生.主句用过去进行时,从句应用一般过去时.when表示“在那时.在将来时从句中,常用when,且从句须用一般时代替将来时.
while：只指一段时间.从句中的动词必须是延续性动词.强调主句的动作在从句动作的发生的过程中或主从句两个动作同时发生.如果从句和主句的动作同时发生,两句都用过去进行时,用while.while表示“而,却'
3.应该是harder吧?!比较级不是吗?
hard有两种词性,adj和adv adj.硬的,坚实的,坚固的,困难的,难懂的,辛苦的,努力的,有力的,猛烈的,铁石心肠的,冷酷无情的,严厉的
adv.努力地,艰难地,严重地,猛烈地
hardly与hard完全是两个意思,hardly是”几乎不,刚刚,仅仅”

英语的几道题1.while he ______(read)the letter,he ____(hear)a knock while he_____(read)the letter,he___________(hear)a knock at while he was reading the letter,he heard a knock at the door 关于新概念.第七课。1.while he______（read）the letter，he______（hear）a k 跪求英语高手!最好附简析! 1.While he ___(write)a letter the While he ----(wait) for the bus,he ------(read) a book. he was falling ____(sleep) when he geard a knock at the door He ____　read ______ write at the age of three. 英语分析,he heard a knock at the door .he 是主语,heard 是谓语,a knock 用所给词正确的时态填空 1.After he had read the book ,he ____ (write) a ____ he was expected to read the letter at each performance, he was a bit of sad when he read the letter