查字典中考网整理了关于2020年中考英语知识点之过去进行时句型转换，希望对同学们有所帮助，仅供参考。
句型转换
因为was/were doing中的was/were是助动词，所以在进行句型转换中要注意不需要再另外借助助动词do/did/does，而是直接借用was/were。如：
肯定句：I was trying to work out a solution to the problem at this time yesterday.
否定句：I wasnt trying to work out a solution to the problem at this time yesterday.
一般疑问句：Were you trying to work out a solution to the problem at this time yesterday?
特殊疑问句：What were you trying to work out at this time yesterday. （划线部分为a solution to the problem）