$\text{1.}$ have to 

$\text{2.}$ have to 

$\text{3.}$ has to 

$\text{4.}$ had to - don't have to 

$\text{5.}$ Does - have to 

$\text{6.}$ don't have to 

→ has/have to + V-inf : phải làm j ( sự việc/hành động bắt buộc phải làm theo ) 

→ Aux + not + have to + V-inf : không cần phải làm j ( sự việc/hành động k bắt buộc ) 

→ Aux + S + have to + V-inf ? 

$\href{}{\color{orange}{\text{@Keisha}}}$

`\text{S + have / has / don't have / doesn't have / ... + to V :}` Bắt buộc phải làm điều gì đó

`1`.don't have to

`2`.have to

`3`.has to

`4`.had to / don't have to

`5`.Does ... have to ?

`6`.don't have to

`\text{@ TheFox}`