be up to和be busy doing区别
2025-08-24
e up to sth.胜任某事 be busying doing 忙于做某事(正在进行 如: What are you up to？你在忙什么？ What are these naughty boys up to?这些淘气的孩子们在干什么？ It's up to me to get the four of us moving.由我来负责我们四个人的行动 ②be busy后面跟doing...
2025-08-24
e up to sth.胜任某事 be busying doing 忙于做某事(正在进行 如: What are you up to？你在忙什么？ What are these naughty boys up to?这些淘气的孩子们在干什么？ It's up to me to get the four of us moving.由我来负责我们四个人的行动 ②be busy后面跟doing...