I think it's very difficult.改为否定句 I can speak English 改为一般疑问

I think it's very difficult.改为否定句 I can speak English 改为一般疑问 I can speak English改为否定句 I can speak English改为一般疑问句 I think I can mend it.改为否定句 I think it's Gary's改为否定句 Mary can speak English very well.改为否定句 I think it's an exciting movies.(改为否定句) I think it's a quiet street 改为否定句 I think it's exciting.（改为否定句） I think chickens can swim.改为否定句：I ( )think chicken can not s I think he can speak English well.（改为反意疑问句） I think he can s I can speak English now.改为一般疑问句