trace back to后只能加时间么?trace back to its history?

trace back to后只能加时间么?trace back to its history? trace.back. trace...back...翻译 appreciate后只能加doing吗?to trace… back…中文 sth.can trace back to xxx还是sth.can be traced back to xxx?或者两者均可? go back后是必须要加to么 哪些英文动词后只能加to do,哪些只能加do ,哪些两者都可? so +adj+后只能加单数么? 哪些英文动词后只能加to do trace…back…的中文是? Queen Marry could trace her ___(祖先)back to about 900 years ago.是填ancestor还是ancestors? trace get to 后加地点副词where/back是什么用法?请举例说明 i find it important to keep myself healthy important 后为什么加to 不是只能是it is后才加to么这个没有is啊 back加s还是es back to the classroom back to classroom要不要加the want与什么连用?后面只能加to吗?because they want read newspapers对不对?want后加to对吗?还是read后加ing,还是reads?