never ,rarely ,sometimes,often ,usually ,always有何区别?十万火急!急待回答!

问题描述:

never ,rarely ,sometimes,often ,usually ,always有何区别?
十万火急!急待回答!

never:从不
rarely:很少
sometimes:有时
often:常常
usually:经常
always:总是
他们的频次逐渐增加