1. There is less milk in the glass than in the bottle.
2. The last time he smoked cigarettes was a month ago. 
[Past Simple]
3. That apartment is the most modern. 
4. It takes me twenty minutes to walk to school every morning.
5. I think losing weight is very difficult.

`1,` There is less milk in the glass than in the bottle.

`→` Cấu trúc dạng so sánh hơn của danh từ:

S + be + more/less + N + (O) + than + O

`2, The last time he smoked cigarettes was a month ago.

`→` S + have/has not + Vpp + for + khoảng thời gian

`=` The last time + S + V(past) + was + khoảng thời gian + ago

`3,` That apartment is the most modern apartment.

`→` Cấu trúc dạng so sánh nhất của tính từ:

S + be + the + most adj/adj-est + (O)

`4,` It takes me twenty minutes to walk to school every morning.

`→` S + spend(s) + thời gian + Ving + (O) 

`=` It takes + O + thời gian + to-inf + (O)

`5,` I think losing weight is very difficult.

`→` S + find(s) + O + tính từ = S + think(s) + O + be + tính từ