If you can open the box,I can close it.这一句是虚拟吗?
you can not open the box if you do not
有关英语语言学的,if you ask somebody"can you close the box?" he answ
I can't lift the box if you don't help me .I ___be ___to the
Can you ___ (opening/open) this box ?
if you cando it,so can I.
I can do it if you kissme
I _____ you feel cold ,you can close the window.
The box is too heavy .Can I help you?A No Thanks B it 's ver
Let me help you to carry the box. I can do it by _______ 填什么
Can you lift the box?
If the phone___ ,can you answer it?
If the phone_______,can you answer it?