1,John,look at the time,_______ you play the piano at such a

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1,John,look at the time,_______ you play the piano at such a late hour?
A must B can C may D need
答案是选A,答案说在询问对方意愿时应用must,但need为什么不行呢,need有‘必须’之意,也可以用在疑问句中,这句话不可以翻译成‘你必须在这么晚的时间弹琴吗?’吗,如果这样翻译那need不是可以吗?
2,The teacher _____ have thought Jhnson was worth it or she would not have wasted time on him,I support.
A should B can C would D must
or不是连词吗,起并列关系吗,or后有would,那前空对应不就要填would吗?但答案是must,为什么?另外这个句子如何翻译啊?看不太懂!
3,If it were not for the fact that she ______ sing,I would invite her to the party.
A could't B should't C can't D might not
但从were可以看出是过去时态,答案C为什么可以呢?can't可不是过去式啊!为什么呢?

1.need有需要的意思,
——must I stay here tonight?
___No,you needn't.我今晚必须在这吗?不你不必在这.
2.这是一个表示猜测的句子,老师一定考虑过-- .否则他不会在他身上浪费时间的.or 时表示转折,否则的意思.可以根据前后句的意思来判断.
3.这是考察虚拟语气,be在表示虚拟语气时.都改为were.
eg.if I were you ,Iwould not do that.如果我是你,我不会那样做.
表示一个人的能力时,用can,虚拟语气的从句用过去式时,表明的是对现在时的虚拟.所以that引导的同位语从句用现在式,要不是因为她不会唱歌,我就邀请她了,言外之意就是歌不会唱歌,所以没邀请她.

请看这题 John,look at the time._____you play the piano at such 2.John,look at the time._____you stop playing the piano at s -----Do you play the piano at home,John?-----No,( )I can't p look at the time 英语翻译Although John ______ (begin) to play the piano at the ag Look at these people _______(play)basketball on the square. sherry is good at ___ the piano .do you like it A.play B.pla The boy was seen _ the piano at 9 yesterday.A.to play B.play I will have a look at the time-table for you on the Internet Are you 什么 good at the piano? Sandy is a ____(music).She could play the piano at the age o i will have a look at the time-table for you.i need an econo