1.  I took Mr. Hoang half an hour to walk to work to yesterday. 
`to` Mr. Hoang spent half an hour walking to work to yesterday.

CT: S+ take/ took+ Sb+ time+ to V = S+ speand/ spent+ time+ V-ing: dành bao nhiêu thời gian để làm gì.
2. Lan didn’t go to school yesterday because of her sickness.  
`to` Because Lan was sick, she didn’t go to school.

CT: Because clause, clause.
 3. Listening to music is more interesting than watching TV.  
`to` I prefer listening to music to watching TV.  

CT: prefer A to B: thích A hơn B.
4. I spend two hours doing my washing every day.
`to` It takes me two hours to do my washing every day.

CT: S+ take/ took+ Sb+ time+ to V = S+ speand/ spent+ time+ V-ing: dành bao nhiêu thời gian để làm gì.
5. We didn’t enjoy the trip because of the heavy rain.
`to` The heavy rain prevented us from enjoying the trip. 

CT: prevent+ Sb from+ V-ing.
6 .What is your daughter’s age, Mrs. Mai?
`to` How old is your daughter, Mrs. Mai?

CT: hỏi tuổi: What be TTSH age? = How ols be S?
7.Minh likes Korean films better than Chinese films.
`to` Minh prefers Korean films to Chinese films.

CT: prefer A to B: thích A hơn B.