1、can用于否定句、疑问句和感叹句中,表惊异怀疑、不相信等态度。 Wherecanthey be now?他们现在能在哪儿呢? Whatcanhe mean?他会是什么意思? 2、must表示与说话人愿望相反及不耐烦,意...
and的基本意思是“和,与”,or的基本意思是“或者,还是”。它们的用法区别如下: 1. 并列结构中,and用于肯定句,or通常用于否定句表示“和,与”之意。 There are some students and teachers on the playground. There is no air or water in the moon. -\-\-I don’t like...
1. 陈述句充当宾语从句时,用that引导,that无词义,在口语或非正式文体中常省略。 I hope (that) you will enjoy our performance. She told us (that) the score was 2 to 1. 2. 当由一...
根据句意,主句动作发生在从句动作之前,从句为一般过去时,所以主句为过去完成时,结构是“had+过去分词”。 点击查看解析 06 -\-\- When did the classroom have a power cut? -\-\-This morn...
2. He has to stay in bed for 3 or 4 days becauseof his illness. 因为他的病,他不得不卧床 3 到 4 天。 疑问句的答语不同: 对must 开头的一般疑问句作肯定回答时用 must,否定回答则用 needn't 或 don't /doesn't have to;包含 have to 的句子变为一般疑问句或否定...
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