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a lot of前面可以用is，也可以用are。当a lot of后接可数名词的复数时，前面用are；当a lot of后接不可数名词时，前面用is。
a lot of前用什么
a lot of前面不是只能用is。
a lot of表示许多，等于many、lots of,常用于名词前面，a lot of friends许多朋友，也可以说many friends或lots of friends.
与many意思相同时，后面接可数名词的复数形式，如There are a lot of trees in the park。
与lots of意思一样时还可以接不可数名词，如There is a lot of rain this year。
a lot of双语例句
I am spending a lot of money and time on this boat, but it is worth it
我在这艘船上花了很多金钱和时间，但都很值得。
I have lost a lot of weight
我体重减了不少。
Is there a lot of effort and money going into this sort of research?
这种研究目前是否有大量的人力和资金投入？
I think a lot of people still underestimate him
我觉得很多人仍然低估了他。
You've caused us a lot of trouble
你给我们造成了很多麻烦。