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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] the box既是这句话的主语, 也是不定式to carry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 apen. (√)
[析] 复数名词前有表个体的each of, one of,every，either of等词组修饰，或有表否定的neitherof, none of 等词组修饰时，谓语动词要用单数形式。
5.例:那是你心软！我不就是一个例子吗？
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