`e.` Her sister is older than she

`-` S1 + tobe + adj_er + than + S2

`-` N(số ít) + is

`f`. Maths is more difficult than English 

`-` S1 + tobe + more + adj + than + S2

`g`. You should read books everyday because it's good for you

`-` should + V(bare)

`-` everyday : mỗi ngày `->` DHNB thì HTĐ

`-` because `->` mệnh đề chỉ lý do

`h`. You shouldn't eat lots of sweets because it isn't good for you

`-` shouldn't + V(bare)

`-` lots of = a lot of = a lot + N(số nhiều)

`i`. You must take this medicine three times a day 

`-` must + V(bare)

`-` S + must + V(bare) + O

`k`. You must bring a compass when travelling 

`-` must + V(bare)

`-` when `->` chỉ thời gian, khi nào,...

`color{pink}{Rosie256}`

e. Her sister is older than her.

S + be + short-adj + er +than + O : ss hơn 

f. Maths is more difficult than English.

S  + be + more + long-adj + than + O : ss hơn 

g. You should read books every day.

should + V1: nên làm gì 

h. You shouldn't eat lots of sweets.

shouldn't + V1: không nên làm gì

i. You must take this medicine three times a day.

must + V1: phải làm gì 

k. You must bring a compass when travelling.

`color{orange}{~LeAiFuRuiHuiBao~}`