she came to shanghai three years ago(保持原意) she ____ ____ in shanghai for three years

问题描述:

she came to shanghai three years ago(保持原意) she ____ ____ in shanghai for three years

填has been
从for three years时间状语可以看出是用现在完成时,即has been

has been

填has been
从for three years时间状语可以看出是用现在完成时,即has been
懂了吗