è¿ä¸ªé®é¢ççæ¡æ¯è¿æ ·çï¼
å½è¡¨ç¤ºä¸»è¯æ¯ä»ä¹æ¶æè
表示主è¯çç¶ææ¶å°±ç¨æ
æå¨è¯å beå¨è¯ã
ä¾å¦ï¼
It should be a cat .å®åºè¯¥æ¯åªç«ã
She might be at home .她å¯è½å¨å®¶ã
è³äºæ
æå¨è¯+beå¨è¯åå¨è¯æ¯æ¥è¿å»åè¯è¿æ¯+ingå°±è¦ç主è¯åè°è¯çå
³ç³»äºãå¦æ主è¯æ¯è°è¯å¨ä½çæ¿åè
ï¼å°±è¦æ¥è¿å»åè¯ï¼ä¸»è¯æ¯ä½äºå¨ä½çååºè
,å°±è¦æ¥ingå½¢å¼ã
ä¾å¦ï¼
Tom should be playing football now .汤å§ç°å¨åºè¯¥å¨è¸¢è¶³çã
Grandpa should be taken good care of .ç¥ç¶åºè¯¥è¢«å¥½å¥½ç
§é¡¾ã