in是介词,介词后面必须接名词,代词或者动名词,即doing。
例句：These laws are in effect in twenty states. 这些法律在二十个州有效。On the day in question we were in Cardiff. 在所说的那一天，我们在加的夫。 扩展资料They were killed in a high-speed crash in a tunnel in Paris.他们在一起发生在巴黎一座隧道里的高速行驶引发的撞车事故中丧生。In her speech, the senator came out in favour of a change in the law.这位参议员在她的'讲话中公开赞成修改法律。The rise in interest rates was not reflected in a corresponding rise in the dollar.利率上调没有反映在相应的美元增值上。They lived in rooms in Kensington.他们住在肯辛顿的出租房间。We went skiing in France in March.三月份我们去法国滑雪了。
