英语造句 用现在完成时造5个句子句子里包括肯定,否定,疑问

\u73ed\u4e3b\u4efb\u63d0\u9192:\u8fd94\u70b9\u6bc1\u6389\u5b69\u5b50\u6210\u7ee9\uff0c\u5bb6\u957f\u5343\u4e07\u4e0d\u80fd\u7eb5\u5bb9 1. I have just washed my clothes.
2. Have you finished doing your homework?
3. They haven't cleaned the classroom yet?
4. Have you ever been to Beijing?
5. She has taught English for two years.