如题所述
be busy with sth ï¼withåé¢å äºæ ï¼å¿äºæäº ã侧éäºå¨ä½ï¼sthæ¯åè¯ãHe is busy with his homework .
be busy doing sth ï¼doing åå å¨è¯è¿è¡å¼ï¼å¿çåæäºã侧éäºç¶æãHe is busy doing his homework .