She must have time in which she can grow calm.=She must have time in which to grow calm. 她必须有冷静下来时的时间。
Allow me one minute in which I can change my clothes. =Allow me one minute in which to change my clothes. 给我一点时间换衣服。
He was miserable unless he had neighbors with whom he could quarrel.=He was miserable unless he had neighbors with whom to quarrel. 他要是没有邻居吵架就难受。
She had some money in the bank, with which she could help her mother.=She had some money in the bank, with which to help her mother. 她银行里有些钱用来帮助她的母亲。
She must have time to grow calm (in). 她必须有冷静下来时的时间。
Allow me one minute to change my clothes (in). 给我一点时间换衣服。
He was miserable unless he had neighbors to quarrel with. 他要是没有邻居吵架就难受。
It’s reported that the city needs more land to build houses on. 据报道，这座城市需要更多的土地来建房。
正：Have you ever spoken to the man who lives next door?
误：Have you ever spoken to the man who to live next door?
正：There the children had a garden in which they could play. (定语从句)
正：There the children had a garden in which to play. (紧缩定语从句)
正：There the children had a garden to play in. (不定式作定语)
误：There the children had a garden which to play in.(不能将介词置于不定式之后)