æææ¯ ä¸å®ä¸ç´é½å¨åæäº
She is so tired .
She must has been working all the morning.
她å¾ç²å³äº
她ä¸å®å·¥ä½äºä¸ä¸ªæ©ä¸
must have been doing 表示è¯å®ççæµ
并ä¸çæµè¿ç§å¨ä½,æè
è¡ä¸ºä¸ç´æç»å°ç°å¨
温馨提示:答案为网友推荐,仅供参考