It is a good thing for her to keep the house clean and tidy

-> She should keep the house clean and tidy.

should + Vinf

They didn't often go to the cinema every Sunday 2 years ago

-> They didn't use to go to the cinema every Sunday last year.

didn't use to + Vinf

~ gửi bạn ~

It is a good thing for her to keep the house clean and tidy

`->` She should keep the house clean and tidy. [should + V(bare)]

(Cô ấy nên giữ nhà cửa sạch sẽ và ngăn nắp.)

They didn't often go to the cinema every Sunday 2 years ago

`->` They didn't use to go to the cinema every Sunday 2 years ago.

[used to: sự việc thường xuyên xảy ra trong quá khứ]

[Cấu trúc: S + used to + V]

(Họ không đến rạp chiếu phim vào mỗi Chủ nhật hai năm trước,)