concern可以作动词,意为：__影响___(句1)；____关于__(句2).也可以作名词,意为：_____担心__(句3).
用concern的适当形式完成句子.1. Our main ___concern___ is that they are not receiving enough help.2. Please pay attention because this information ___concerns____all of you.3. We’re rather ____concerned____ about our father’s health
suffer作及物动词,意为：__遭受_（句1）其后常接damage, harm, loss, pain等；___忍受__（句2）,常用于否定句.Suffer作___不及物___动词,常与from连用,意为“患病”（句3）；___受苦___(句4).
用suffer的适当形式完成句子.1.Mary ___is suffering __(正遭受) ill health at the moment.2.The company ___suffered severely_____(遭受了极大损失) last year
calm可以作___形容词___,意为：__镇静的_(句1)；__平静的_(句2).也可以作___及物动词___,意为：____使平静____(句3,句4).
根据括号内的提示完成句子.1.____he was calm_______(他很平静) when I told him the bad news.2.It was difficult to ______calm the football fans______(使足球迷们平静).