So do I .( 因为have 作实义动词） have 作助动词时,如He has been to Beijing ,so have I. 再问： I have to go to school tomorrow.回答是什么呢？ 再答： I have to go to school tomorrow， so does he / so do they .( 注：HAVE TO 相当于情态动词，但变疑问句或否定句时要加助动词do / does ) 再问： I haven't seen the film "阿凡达" .现在完成时吧？是用Neither have I是吧？ 再答： 是的
