1.Because he was ill yesterday, so he didn’t go to work. (×)
Because he was ill yesterday, he didn’t go to work. (√)
He was ill yesterday, so he didn’t go to work. (√)
[析]用though,but表示“虽然……，但是……”或用because,so表示“因为……，所以……”时，though和but及because和so都只能择一而用，不能两者同时使用。
2.The Smiths have moved Beijing. (×)
The Smiths have moved to Beijing. (√)
[析]不及物动词后接名词或代词作宾语时，要在动词之后加上适当的介词；但不及物动词后接home,here,there等副词作宾语时，动词之后不必加任何介词。
3.The box is too heavy for him to carry it. (×)
The box is too heavy for him to carry. (√)
[析]thebox既是这句话的主语，也是不定式tocarry的逻辑宾语，若句末再加上it，就和the box重复了。
4.Each of the boys have a pen. (×)
Each of the boys has a pen. (√)
[析]复数名词前有表个体的each of,one of,every，eitherof等词组修饰，或有表否定的neither of,none of等词组修饰时，谓语动词要用单数形式。
5.Neither he nor you is good at English. (×)
NeitherhenoryouaregoodatEnglish. (√)
[析]either...or...,neither...nor...,notonly...,butalso.。.等词组连接句子的两个主语时，谓语动词遵循“就近一致原则”，即由靠近谓语的那个主语决定谓语的人称和数用何种形式。
6.Ten minus three are seven. (×)
Ten minus three is seven. (√)
[析]用英语表示加(plus)、减(minus)等数学运算时，谓语动词也用单数形式。
7.The number of the workers in this factory are about 5,000. (×)
The number of the workers in this factory is about 5,000. (√)
[析]the number of 表示“……的数量”，谓语动词用单数形式；a number of的意思是“若干”或“许多”，相当于some或a lot of，和复数名词连用，谓语动词用复数形式。
8.Hello! I have important something to tell you. (×)
Hello! I have something important to tell you. (√)
[析]形容词或动词不定式修饰不定代词作定语时，修饰成分要置于不定代词之后。
9.His son is enough old to go to school. (×)
His son is old enough to go to school. (√)
[析]enough作形容词修饰名词时，可以放在名词前，也可放在名词后；作副词修饰形容词或副词时，只能放在形容词或副词之后。
10.Here is your sweater, put away it. (×)
Here is your sweater, put it away. (√)
[析]put away,pick up,put on等“动词+副词”构成的词组后接代词作宾语时，代词只能放在动词和副词之间。
