ä¸è
ç主è¦åºå«ä¸ºå¨ä½çå®æç¶è¯ä¸åï¼ã
1.to do强è°å»åï¼ä½è¿æ²¡åï¼ä¾ï¼
I have something to do tomorrow.
æ天ææäºäºæ
è¦å»åï¼
2.to be doing 强è°æ£å¨åï¼ä¾ï¼
Everyone seems to be doing it.
æ¯ä¸ªäººä¼¼ä¹é½å¨è¿æ ·åã
3.ãto have done强è°çæ¯å¨ä½ä¸ºå®ææ¶ï¼ä¾ï¼
They ought to have done something and they haven't.
ä»ä»¬äºååºè¯¥åä¸äºäºæ
èä»ä»¬å´æ²¡æã
温馨提示:答案为网友推荐,仅供参考