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It _____(take)her 2 hours to finish her homework.
主语为复数 谓复
They____(be)looking forward to visiting the museum.
Tom and Lily ____(go)to school together.
(一)单则单,复则复
1、当主语是:
be---is
行为动词变三单
be---are
行为动词用原形
注意:1.由连接词and或both … and连接起来的两个并列主语,要用谓语动词的复数形式。
如:Lucy and Lily twins.
Both she and he students.
are
are
2、trousers, glasses, clothes, shoes等复数形式的词作主语时,谓语用复数,但如果这些名词前有a (the) pair of等量词修饰时,谓语动词用单数。
如:My glasses broken.
The pair of shoes under the bed his.
are
is
就近原则
there be 与 not only...but also
There ___(be)a book and two pencils on the desk.
Not only him but also I___(enjoy)doing sports.
特殊用法
一谓语动词用单数
1.当表示时间、长度、距离、金钱、度量、书名等词组作主语时,常将其看作是一个整体,谓语动词要用单数形式。
例如:Two years is quite a long time. Ten dollars is enough.
2.加减乘除也常当作整体对待,谓语动词也用单数形式。
例如:Forty-one and fifty-nine is one hundred.