表示正在做某事或伴随时,用-ing
表目的时用to
eg.He is coming.(他来了)
she is singing while dancing.(她一边唱歌,一边跳舞)
I jumped to catch the bird.(我跳起来捉那只鸟)
表示正在做某事或伴随时,用-ing
表目的时用to
eg.He is coming.(他来了)
she is singing while dancing.(她一边唱歌,一边跳舞)
I jumped to catch the bird.(我跳起来捉那只鸟)