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there must be用法

"There must be"是"There be"句型的一種特殊用法,表示「肯定有……;一定有……」。

例如,在句子"There must be a lot of cars in the motorway."中,"there must be"用來表達「高速路上一定有很多車」的意思。

此外,"there must be"後面除了跟is,are,was和were外,還可以跟包含be的複合謂語形式,如"There will be"、"There can be"、"There should be"、"There is going to be"、"There ought to be"等。