新概念英语第一册77课有哪些时态

Terrible toothache Nurse:Good morning,MrCroft.
Mr Croft:Good morning,nurse.
I want to see the dentist,please.
Nurse:Have you an appointment?
Mr Croft:No,I haven't .
Nurse:Is it urgent?
Mr Croft:Yes,it is .
It's very urgent.
I feel awful.
I have a terrible toothache.
Nurse:Can you come at 10 am on Monday,April 24th?
Mr Croft:I must see the dentist now,nurse.
Nurse:The dentist is very busy at themoment.
Can you come at 2:00 PM?
Mr Croft:That's very late.
Can't the dentist see me now?
Nurse:I'm afraid that he can't ,Mr Croft.
Can't you wait till this afternoon?
Mr Croft:I can wait,but my toothachecan't !
是这一篇课文吧?里面只有一般现在时一种时态哦,里面情态动词用的比较多,另外还涉及到情态动词、实意动词和系动词的一般疑问句及其肯定和否定回答.

只有一般现在时和一般过去时