1.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「雖然……，但是…… 」或用because, so 表示「因為……，所以……」時，though和but 及because和so 都只能擇一而用，不能兩者同時使用。
2.The Smiths have moved Beijing. (×)
The Smiths have moved to Beijing. (√)
[析] 不及物動詞後接名詞或代詞作賓語時，要在動詞之後加上適當的介詞;但不及物動詞後接home, here, there等副詞作賓語時，動詞之後不必加任何介詞。
3.The box is too heavy for him to carry it. (×)
The box is too heavy for him to carry. (√)
[析] the box既是這句話的主語, 也是不定式to carry的邏輯賓語，若句末再加上it，就和the box重複了。
4.Each of the boys have a pen. (×)
Each of the boys has a pen. (√)
[析] 複數名詞前有表個體的each of, one of, every，either of等詞組修飾，或有表否定的neither of, none of 等詞組修飾時，謂語動詞要用單數形式。
5.例:那是你心軟!我不就是一個例子嗎?
Neither he nor you is good at English. (×)
Neither he nor you are good at English. (√)
[析] either... or..., neither... nor..., not only..., but also... 等詞組連接句子的兩個主語時，謂語動詞遵循「就近一致原則」, 即由靠近謂語的那個主語決定謂語的人稱和數用何種形式。
6.Ten minus three are seven. (×)
Ten minus three is seven. (√)
[析] 用英語表示加(plus)、減(minus)等數學運算時，謂語動詞也用單數形式。
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「……的數量」，謂語動詞用單數形式;a number of 的意思是「若干」或「許多」，相當於some或a lot of，和複數名詞連用，謂語動詞用複數形式。
8. 例. Hello! I have important something to tell you. (×)
Hello! I have something important to tell you. (√)
[析] 形容詞或動詞不定式修飾不定代詞作定語時，修飾成分要置於不定代詞之後。
9. His son is enough old to go to school. (×)
His son is old enough to go to school. (√)
[析] enough作形容詞修飾名詞時，可以放在名詞前，也可放在名詞後;作副詞修飾形容詞或副詞時，只能放在形容詞或副詞之後。
10.. Here is your sweater, put away it.(×)
Here is your sweater, put it away. (√)
[析] put away, pick up, put on等「動詞+副詞」構成的詞組後接代詞作賓語時，代詞只能放在動詞和副詞之間。
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