第四个单词应该是heard吧 since since [sins] adv. 1.此后,自那以后；后来2.之前,以前 prep. 1.从…至今：例句:There have been many changes since the war. 从战争到现在发生了许多变化.2.自从…,自…算来,自…以来：例句:It has been raining since morning. 从早晨到现在一直在下雨. conj. 1.以后,在…以后的时间里：例句:She has rung me once since she left. 她离家后给我来过一次电话.2.[常前接 ever] 自…以来,自…至今：例句:I've been busy ever since I came back. 自我回来后一直在忙.3.因为；既然：例句:Since this is so,it's better to accept it. 既来之,则安之. 所以这句话应该是： 自从她离开家之后就再也没听到过丈夫的消息.
