1.(Ignored)by the host at the party ,he was unhappy .这里的过去时态表示被动.在舞会上被主人忽略使他很不高兴.
2.He (suffered a lot )when he was a child .他年轻时候受了很多苦.这里的过去时表示过去.
3.I am concerned about Mary for she keeps coughing .(be concerned about表示关心,keep doing表示持续某一动作 或一件事情)
4.(1)I always start the day by (going through)my mail.我一般都是一看邮件来开是我的一天.
(2)My grandmother (went through)great hardships in the past .我祖母过去经历过好多困难.