half of +n后面用is还是are one third of +n呢

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half of +n后面用is还是are one third of +n呢
half of +n后面用is还是are one third of +n呢

half of +n后面用is还是are one third of +n呢
half of/one third of+名词的形式,后面的be动词,都取决于名词的单复数;
若名词是单数,则用is或者was;
若名词是复数,则用are或者were;
其中,is或者are用于现在式,was或者were用于过去式;