practice doing sth练习做某事 My sister practices playing the piano every day.

practice sth练习某事= My sister practices the piano every day.

practice+代词练习…… Practice it more.

spend+时/钱 (in) doing sth花多少时／钱做某事 I spent 2 yuan buying the clothes.

spend+时/钱 on sth花多少时／钱在某物上 I spent 2 yuan on the clothes.

ask sb to do sth叫某人去做某事 My mother ask me to buy some vegetables after school.

ask sb not to do sth叫某人不要去做某事 The teacher asks the students not to play on the road.

ask sb about sth问某人关于某事／某物 My father asks me about the exam.

ask sb for sth问／找某人要某物 I often ask my parents for money.

It’s time to do sth该做某事了 It’s time to have dinner.

It’s time for sb to do sth某人该做某事了 It’s time for me to have dinner.

It’s time for sth某事的时间到了 It’ time for dinner.

watch sb/ sth doing sth看见某人／某物正在做某事 Old Henry often watches Wangwang playing the balls.

watch sb/ sth do sth看见某人／某物做过某事 I watched him do his homework.

suggest doing sth建议做某事 I suggest going to the park not the zoo.

suggest sth建议某物／某事 He suggests the plan.

suggest+从句　建议…… I suggest that we should go to the park this weekends.

find sb/ sth doing sth发现某人／某物正在做某事 I found it playing the ball.

find sb/ sth do sth发现某人／某物做过某事 I found it play the ball.

help sb do sth帮助某人做某事 He often helps me do the housework.

help sb with sth帮助某人某事 He often helps me with the housework.

make sb do sth使／让某人做某事 It made me feel happy.

decide to do sth决定去做某事 We decided to go to the park this weekend.

decide not to do sth决定不去做某事 We decided not to go to the park this weekend.

decide sth决定某物／某事 We decided the plan.

decide+从句　决定…… We decided that we will go to the park this weekend.

discuss sth with sb和某人讨论某事 I often disscuss my study with my teacher.

discuss sth讨论某物／某事 We often discuss it.