They don't seem to trust you with it.最好有短语说明.

译为：他们在这件事上并不信任你!
seem to be doingsth表示不定式的动作和主句中seem是同一个时态,比如,He seems to be doing his homework. 他好像正在做作业；
seemtodo 表示不定式的动作发生在主句动词seem之后,比如It seems to rain. 好像要下雨了. rain的动作,是发生在seem之后的；
seemtohavedone sth表示不定式的动作发生在主句动词seem之前,比如 she seems to have finished her homework. 她好像做完了她的家庭作业.finish的动作发生在seem之前