`1.` Nancy didn't have to clean the Pat.

`-` It wasn't necessary + for sb + to V `=` S + didn't have to + V(bare)

`2.` You should spend more time talking with your children.

`-` S + should + V(bare): Ai đó nên làm gì

`-` spend + time + V-ing: dành thời làm gì đó

`-` with sb: với ai đó

`3.` John mustn't use that computer.

`-` S + don't/doesn't + get permission + to V = S + mustn't + V(bare)

`4.` People who work here must leave by 6 p.m.

`-` It is necessary that + Clause = S + must + V(bare)

`5.` Ms. Ly has to clean the floor every day.

`-` S + is/am/are + in charge of + V-ing = S + have/has to + V(bare)

`1`.Nancy didn't have to clean the flat

`->` S + don't / doesn't / ... + have + to do sth

`=>` Không cần phải làm gì

`2`.You should spend more time on talking with your children

`->` S + should ( not ) + V-inf

`=>` ( Không ) nên làm gì

`->` S + spend + time + ( on ) V-ing

`=>` Dành thời gian làm gì

`3`.John mustn't use that computer

`->` S + mustn't + V-inf

`=>` Không được phép làm gì

`4`.People who work here must leave by `6` p.m

`->` S + must + V-inf

`=>` Bắt buộc phải làm gì

`->` Who là MĐQH dùng để thay thế Danh từ chỉ người đứng trước nó

`->` Who `=` people

`5`.Ms.Ly has to clean the floor everyday

`->` S + have / has / ... + to do sth

`=>` Phải làm gì

`\text{# TF}`