Question

a lot of 通常用在什么句中

a lot of 通常用于肯定句，否定句还是疑问句

Answer 1

a lot of
英 [ə lɔt ɔv] 美 [e lɑt ʌv]
adj. 诸多;许多的
a lot of 一般用于肯定句中，后接可数或不可数名词.
举例造句：
1、
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。
2
I have lost a lot of weight
我体重减了不少。
3
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？
4
I think a lot of people still underestimate him
我觉得很多人仍然低估了他。

Answer 2

a lot of 等同于 lots of，只能用在肯定句中。既可修饰可数复数名词，也可修饰不可数名词。

Answer 3

a lot of（=lots of）有形容词性，可用作定语修饰可数名词复数或不可数名词。如：
I've brought a lot of books back with me. 我带回了很多书。（定语）
A lot of money went on wining and dining prospective clients. 很多钱都花在宴请潜在客户上了。

Answer 4

一般用于肯定句。否定句和疑问句一般用many和much代替。