`1.` Hana hasn't written to her pen pal for five months.

`-` S + (last) + V-ed/c2 + ... + time ago

`=` S + haven't/hasn't + V-ed/c3 + ... + for time

`2.` This box is not light enough for me to carry.

`-` S + tobe + too + adj + (for sb) + to V-inf

`-` S + tobe + (not) + adj + enough + (for sb) + to V-inf

`3.` It takes me 20 minutes every day to walk to school.

`-` It + takes + sb + time + to V-inf

`4.` Jack knows Anna doesn't like him , but he still chases after.

`-` chase after sb : đuổi theo ai

`-` S + V although S + V

`=` S + V , but S + V

`5.` This bag was given to me by my brother.

`-` Bị động QKD : S + was/were + V-ed/c3 + ... + (by+O)

`-` give sth to sb : đưa thứ gì cho ai

` 1`. Hana hasn't written to her penpal for five months.

` -` for + khoảng thời gian

` -` HTHT : S + has/have + not + V-ed/V3 + ...

` 2`. This box is not light enough for me to carry.

` -` enough for sb to do sth : đủ để ai làm gì

` -` heavy ` ><` light

` 3`. It takes me 20 minutes everyday to walk to school.

` -` It takes sb + time + to do sth : cái gì mất của ai bao nhiêu thời gian để làm gì

` 4`. Jack knows that Anna doesn’t like him but he still chases after her.

` -` but + S + V + O : vì ...

` 5`. This bag was given to me by my brother.

` -` Bị động QKĐ : S + was/were + V-ed/V3 + (by + O) ...