判断下列句子是否正确。正确的打“√”，如有错，打"×"，写出正确的句子。
(1)I do my homework now.              （   ）                    
(2)Zhangpeng is 4 cm tall than Mike.  （   ）                    
(3)How do you feel ? I feel sad.      （   ）                    
(4)Did she her homework last night ?  （   ）                    
(5)My apple is biger than yours.      （   ）                    
(6)Lisa likes playing piano.          （   ）                    
(7)My hobby is collect stamps.        （   ）                    
(8)Do she teach English?              （   ）