请根据括号内的要求,改写下列句子,每空一词
1 They have been studying English for a longtime.(改为一般疑问句）
2 Would you mind piaying basketballhere?(改为否定句）
3 Toby began to conllect coins two years agn.(用现在完成时改写）
4 Linda doesn't want to watch TV.she wants to swim.(合并句子）
5 I want to have a cup of coffee.There is milk in my coffee.(合并句子）
6 Harvey has gone to Beijing for vacation（改为反意句）