`1`.In the past my hair used to be shorter than now

`\rightarrow` So sánh hơn : S1 + be + adj-er / more adj + than + S2

`\rightarrow` `\text{S + used to + V :}` Đã từng

`2`.Mary used to work in this company

`\rightarrow` `\text{S + used to + V :}` Đã từng

`3`.Although my foot was hurt , I managed to walk to the nearest village

`\rightarrow` Although + C1 + C2 : Mặc dù

`4`.In spite of the fact that he overslept , Mike wasn't late for work

`\rightarrow` Despite / In spite of + the fact that + C1 + C2 : Mặc dù

`\text{@ TheFox}`