几个英语句子的疑惑1.It wasn't such a good dinner as she had promised

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几个英语句子的疑惑
1.It wasn't such a good dinner as she had promised us.我在很多题目中遇到,有些时候用AS 有些时候用that ,两者要如何区分呢?
2.Reducing each of the following complex sentences
A.As far as i know,she has never been there.
B.I don't know when he will come.
thanks!

1 貌似差很多吧,as在这里解释为如,像,；that用在这作定语从句（promise sb sth),这不是她所许诺的好晚餐.
2 这题目好坑爹...是把主从复合句换成简单句吗...
She has never been here.I know that so far.
He will come.But I don't know the time.
貌似变长许多哈- -...

几个英语句子的疑惑1.It wasn't such a good dinner as she had promised it wasn^t such a good dinner as she had promised us.为什么是as , it wasn't such a good dinner as she had promised us. 怎样去了解这个句子It wasn't such a good dinner as she had promised us It wasn't such a good dinner __ she had promised us. A.that 26.It wasn't such a good dinner ____ she had promised us. It wasn't such a good dinner _____ she had promised us. It wasn’t such a good dinner _________ she had promised us. wasn't such a.good dinner __ she had promised us.A.that B.wh It wasn't such a good dinner ____she had promised us it wasn't such agood dinner( )she had promised us分析句型并详细解答选项 It wasn't such a good film ___the advertisment had promised