practice doing：练习做某事；实践做。 finish doing：完成做某事；做完某事。 俩个都是动宾短语。 例如： Practice doing the things you are unsure about . 对自己不确定能做的事要练习。 This is the place where children can practice singing. 这是孩子们可以练习唱歌的地方。 If you finish doing your work, you can do what you like. 如果你做完你的工作，你可以做你喜欢的事。 Every night when I finish doing my homework and it's time for sleep, I will always brush my teeth and wash my feet first. 每天做完作业要睡觉的时候我总是先洗脚刷牙。 I will finish doing the work this Saturday. 我周六将完成做这个工作。
