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2020年中考英语：重要语法复习(3)
一、比较have to和must
1) 两词都是'必须'的意思，have to 表示客观的需要， must 表示说话人主观上的看法，既主观上的必要。
My brother was very ill, so I had to call the doctor in the middle of the night. 我弟弟病得很厉害，我只得半夜里把医生请来。(客观上需要做这件事)
He said that they must work hard. 他说他们必须努力工作。(主观上要做这件事)
2) have to有人称、数、时态的变化，而must只有一种形式。但must 可用于间接引语中表示过去的必要或义务。
He had to look after his sister yesterday。
3) 在否定结构中： don't have to表示"不必" mustn't表示"禁止"，
You don't have to tell him about it. 你不一定要把此事告诉他。
You mustn't tell him about it. 你一定不要把这件事告诉他。
2020中考英语：宾语从句的词汇用法
在句子中起宾语作用的从句叫宾语从句。常用的连接词有：that; if; whether; what; which; who; whom; when; where; how; why等。
一、宾语从句是陈述句时，用that引导
在口语中that常被省略。
如：I know(that) you are a student.
二、宾语从句是一般疑问句时，用if或whether来引导
if, whether意为“是否”，whether还可以与or not连用。
如：Lily wanted to know if her grandma liked the handbag.
莉莉想知道她的姐姐是否喜欢这个手提袋。
三、宾语从句是特殊疑问句时，用疑问词引导
如：He didn’t tell me where he was going.
他没告诉我他想去哪儿。
Can you tell me what he said just now?
你能告诉我他刚才说什么吗?
2020年中考英语：从句时态的复习
1. 如果主句是一般现在时、一般将来时或祈使句时，宾语从句的时态不受限制，可以根据实际表达的需要来确定。
如：Could you tell me what he said at the meeting?
你能告诉我他在会上说什么。
He will tell us that he has been able to look after himself.
他会告诉我们他已经能告诉他自己。
Tell him when we will finish our work.
告诉他我们什么时候完成工作。
2.【考查点】如果主句是过去的某种时态，宾语从句应与主句保持一致，用过去的某种时态。
如：He said that he was born in Wenzhou in 1996.
他说他1996年出生于温州。
They said that they had already seen the film.
他们说他们已经看过这部电影了。
3.【易错点】如果宾语从句所叙述的是客观事实、格言、科学真理时，从句时态不受主句限制，用一般现在时。
如： Everyone knew there are 365 days in a year.
大家都知道一年有365天。
She said that two heads are better than one.
她说三个臭皮匠顶个诸葛亮。
He said that the sun rises in the east.
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