ARE YOU SURE_ ING?
they are waiting for you为什么加ing
How are you feeling feel为什么加ing
I don't know why you are worry ing
Are you interested in surfing?为什么surf要加ing?
为什么how are you feeling?要加ing
What's the matter?Why are you laugh/laugh-ing?
What are you talking about?为什么talk加ing
what are you doing do为什么加ing
What are you doing为什么要加ing
he wanted to make sure_
thay are looking out after you ,另外are +ing 这个什么时态类似的有哪些?
How can you hear if you are not listening.为什么listening要加ing