1. Last year, theatre tickets were cheaper than they are now.

2. It's often difficult to phone the booking office.

3. Peter said, How about going to the booking office yourself?

4. At many theatres, you can pay by credit card.

5. Smoking isn't allowed in the theatre.

*GT: - S + can't + V-infinitive = It's not allowed to do sth

        - QKĐ: +) Tobe: (+) S + was/were + C

        - So sánh hơn với adj: S1 + be + more adj/adj-er + than + S2.

         - It's adj to do sth

         - Let + O + V-infinitive 

         = Why don't + S + V-infinitive?

         = What/How about + V-ing?

`1`.Last year , theatre tickets were cheaper than they are now

`->` SSH :

`=>` S1 + is / am / are / ... + adj-er / more adj + than + S2

`*` Khi Tính từ có `1` âm tiết , ta thêm đuôi " -er " sau nó

`2`.It is often difficult to phone the booking office

`->` It is ( not ) + adj ( for O ) + to do sth

`=>` Như thế nào để làm gì

`3`.Peter said " How about going to the booking office yourself ? "

`->` Tường thuật NV dạng Trực tiếp :

`=>` S + asked + O + " Clause "

`->` How about + V-ing ?

`=>` Dùng để hỏi về ý kiến 

`4`.At many theatres , you can pay by credit cards

`->` S + can / can't + V-inf : Có thể / Không thể làm gì

`->` By + Phương tiện , cách thức

`5`.Smoking isn't allowed in the theatre

`->` BĐPĐ `-` HTĐ : S + isn't / 'm not / aren't + VpII ( by O )

`->` allow ( v ) : cho phép

`\text{# TF}`