many much的用法和區別

例句：

Many items are at half price.

許多商品都以半價出售。

Many Quebeckers are federalists.

很多魁北克人是聯邦主義者。

The war separated many families.

這場戰爭使許多家庭離散。

There isn't much mail today.

今天郵件不多。

Need you have paid so much?

你用得着花那麼多錢嗎？

How much thickener is used?

用了多少增稠劑？