这个句式表示程度随时间的推移而产生变化，只能有一个主语。
This pattern indicates that the degree of a certain respect changes as the time goes by, and there is only one subject.
时间作主语看作单数，自从老人在学校里开始教学以来三十年过去了。
Thirty years __has_ __passed_ since the old man _began __ to teach in a school.
这个句式表示程度随时间的推移而产生变化，只能有一个主语。
As time goes on, these inappropriate movement patterns can become automatic.
应用推荐