1.Twenty years ------(pass)since Icame here.2.jim has been i

1。Twenty years (has passed )since I came here。SINCE 是现在完成时的标志。2。jim has been ill for three weeks and (has missed )a lot of lessons。AND 连接的两个动词时态要一致。3。那件套装花了他1800元That( suit cost ) him 1800yuan。用一般过去时。COST 的过去时与原形相同。4。这个电影值得看一看The film is (worthy seeing )。5。他是第一个到的He was the (first ) to (arrive )