a few和few修饰可数名词，a little和little修饰不可数名词;a few和a little表示肯定意义，few和little表示否定意义，可受only修饰。如：
① Few people will agree to the plan because it’s too dangerous.
②This text is easy to understand though there are a few new words in it.
③ There is little water left in glass. Will you please give me some
④ Don’t worry, we have a little time left.