both：表示两者都有，例如“She can read both English and Chinese.”

all：表示所有的，例如“All the students are doing their homework.”

either：表示任何一个，例如“You can choose either red or blue.”

neither：表示两者都没有，例如“He can neither draw nor sing.”

none：表示没有任何一个，例如“None of the students were able to solve the problem.”