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1.ä¸è¬ç°å¨æ¶:主è¯+do/does(ç°å¨åè¯) We clean the room every day.
ä¸è¬ç°å¨æ¶ï¼do(n't)/does(n't)
2.ä¸è¬è¿å»æ¶:主è¯+did We cleaned the room just now.
ä¸è¬è¿å»å¼ï¼did(n't)+V.å
3.ç°å¨è¿è¡æ¶:主è¯+am/is/are doing We are cleaning the room now.
ç°å¨è¿è¡æ¶ï¼am(not)/is(n't)/are(n't)+V.ing
4.è¿å»è¿è¡æ¶:was/were doing .We were cheaning the room at 5:00 yesterday afternoon.
è¿å»è¿è¡æ¶ï¼was(n't)/were(n't)+V.ing
5.ç°å¨å®ææ¶: have/has done We have cleaned the room already.
ç°å¨å®ææ¶ï¼have(n't)/has(n't)+è¿å»åè¯ï¼p.p.)
6.è¿å»å®ææ¶: had done We had cleaned the room before he arrived.
è¿å»å®ææ¶ï¼had+p.p.
7.ä¸è¬å°æ¥æ¶: will do/ We will clean the room tomorrow.
ä¸è¬å°æ¥æ¶ï¼will(not)+V.ing / is(n't)/are(n't)+going to +V.å
8.è¿å»å°æ¥æ¶: was/were to /would do He said he would clean the room next
è¿å»å°æ¥æ¶ï¼would(n't) / was(n't)/were(n't)+V.å
å¨è¯ä¸å®å¼ï¼to+V.ing
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