after的介词用法总结
after+名词，作为介宾短语。
after+动名词 ，也是作为介宾短语。
after+代词，作为宾语的主语。
I could come next week, or the week after.
我可能下周来，或者再下一周。
The first 24 hours after the operation are the most critical.
病人手术后头24小时是最危险的。
An accurate diagnosis was made after a series of tests.
准确的诊断是在一系列的检查后作出的。
The child disappeared from his home some time after four.
这孩子四点多的时候就离家不见了。
The traffic took a long time to clear after the accident.
事故过去后很长时间交通才恢复畅通。