21. The film was so boring that i/we couldn't watch till the end.

=> S + be + too + adj + to-V

= S + be + so + adj + that + clause

22. The house on the corner is too expensive for us to buy.

=> S + be + not + adj + enough + ( for sb) + to-V

= S + be + too + adj + ( for sb ) + to-V

23. I spend one hour and a half driving my children to school.

=> spend time + V-ing = take so time to do sth: tiêu tốn thời gian làm điều gì

24. She is interested in taking photos of her children

=> be keen on = be interested in = be fond of: thích làm điều gì

25. Taro is not interested in reading books.

=> not be interested in + V-ing: không thích làm gì

26. It took them half an hour to walk to the bus stop.

=> Take/ Took so time to do sth: mất của ai đó bao nhiều thời gian để làm gì

27. You should not spend time hanging out with him.

=> waste time doing sth = spend time doing sth: tiêu tốn/ lãng phí thời gian làm điều gì

28. Girls often spend hours buying new clothes.

=> waste time doing sth = spend time doing sth: tiêu tốn/ lãng phí thời gian làm điều gì

29. What about having a cup of tea.

=> Let's + V-infi = What about + V-ing: Câu mời, hẹn ai đó làm gì

30. How about going to the cinema together.

=> Why don't we + V-infi = How about + V-ing: Câu mời, hẹn ai đó làm gì