2023年中考英语知识点复习句型分类句型转换易错分类解析。
1. 若原句中有动词be
原句中含有be动词(am, is, are, was, were) 和助动词(h**e, has, had) 和情态动词(can, shall, will, may, should, would, might, had better等)时，要在动词后直接加not。如：
his mother has already called the police for help. (乌鲁木齐市中考题)
his mothercalled the police for help答案：hasn't, yet)
2. 若原句中没有动词be
原句中没有be动词，助动词或情态动词时，要在行为动词前加助动词(do, does, did)与否定副词not的缩写形式。另外，还需要将原句子中的some改为any； too改either；already改为yet。还需要分清do, h**e等是实义动词还是助动词。
如：the old man hurt his leg last wednesday. (西宁市中考题)
the old manhis leg last wednesday. (答案：didn't hurt)
3. 若原句中有不定代词。
原句中含有every, everything, all, both等不定代词或both…and…, a lot of 等短语时，与否定副词not连用属部分否定。把这些不定代词变成neither, none, no one或把both…and…变成neither…nor…时，才是全部否定。如：
both joy and sam like singing beijing opera. (新疆中考题)
joysam likes singing beijing opera.(答案：neither, nor)
4. 若原句为复合句。
在含有宾语从句的主从复合句中，当主句的主语是第一人称，谓语动词是think时，如果要否定后面的宾语从句，习惯上否定主句的谓语动词。如：
i think she will come here soon. →i don't think she will come here soon
中考句型转换错误分析。
1. i think she is there.
误：i think she isn't there.
正：i don't think she is there.
析：英语中think, believe, expect, suppose等表示信念和揣测的动词，后接that从句时，习惯上将从句中的否定形式转移到主句上，即否定主句谓语，不否定从句谓语。
2. he can sing this song and that one.
误：he cannot sing this song and that one.
正；he cannot sing this song or that one.
析：肯定句中的连词and在否定句中一般要改为or。
3. tom went to school too.
误：tom didn't go to school too.
正：tom didn't go to school either.
析：too和also用于肯定句中时，否定句中用either替换。
4. he has had supper already.
误：he hasn't had supper already.
正：he hasn't had supper yet.
析：随着对谓语动词的否定，某些副词也要作相应的变动。
5. he had a good rest just now.
误：he hadn't a good rest just now.
正：he didn't h**e a good rest just now.
析：h**e在表示开会、吃饭、休息、进行体育锻炼等词组中是行为动词，否定句用助动词来完成。
6. let's do it.
误：let's don't do it.
正：don't let's do it.或let's not do it.
析：let后接的是不带to的不定式，变为否定式，直接在句首前加don't或在不定式前加not。
7. he always gets there on time.
误：he doesn't always get there on time.
正：he never gets there on time.
析：he doesn't always get there on time意为"他并非老是准时到那儿"，是部分否定，习惯上把句中的副词改为相应的表示否定的副词即可。如：
it often rains here. it seldom rains here.
8. be here early tomorrow.
误：be not here early tomorrow.
正：don't be here early tomorrow.
析：祈使句的否定，一般在谓语动词前加do not的缩写don't。
9. you had better come.
误：you didn't h**e better come.
正：you had better not come.
析：had better相当于一情态动词，不可分割，因此not应放在其后。would rather也是如此。
10. both tom and xiao ping went to school.
误：both tom and xiao ping didn't go to school.
正：neither tom nor xiao ping went to school.
析：一个句子中如果有不定代词both，all, every改为否定式时，要把这些不定代词改为相应的表示否定的代词。
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