1.我将永远忘不了我们在一起的时间．
主：我忘不了时间I'll never forget the days.
从：我们在一起的时间We spent together.
合：I'll never forget the days (which) we spent together.
好吧.我还是没看懂楼主的意思.姑且造一句吧.
在她裤子上擦过手的地方有脏痕迹.
主:她的裤子上有脏痕迹：There were dirty marks on her trousers.
从：她在裤子上擦过手.She had wiped her hands on the trousers.
合：There were dirty marks on her trousers where she had wiped her hands.
= = 楼主自己题目打错.怎么可能回答得对?还有together拼错了.