ä¸è¬è¿å»å¼have,doçååè§åå¥å转æ¢
åå½¢ï¼have, è¿å»å¼ï¼had, è¿å»åè¯ï¼had
åå½¢ï¼do, è¿å»å¼ï¼did, è¿å»åè¯ï¼done
举ä¾ï¼I had the bike repaired yesterday. ææ¨å¤©æ¾äººä¿®äºèªè¡è½¦ã
举ä¾ï¼I did my homework yesterday. ææ¨å¤©åäºå®¶åºä½ä¸ã
have的过去式为 had,do的过去式是did
动词的过去式变化规则如下:
一般直接加ed,如walk--walked;
以不发音的e结尾的动词,加d,如dance--danced;
以辅音字母+y结尾的动词,变y为i,再加ed,如study--studied;
以重读闭音节结尾的动词,双写尾字母,再加ed,如stop-stopped;
不规则变化(见表格),如sit--sat.
句型转换:
含was、were的,be动词直接提前。如:
Tom was a doctor.----->Was Tom a doctor?
须借助于助动词did,且将过去式变为动词原形
Tom went to school by bus last week.----> Did Tom go to school by bus last week?
望采纳,谢谢!
精锐长宁天山英语组
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