考前英语问问问,Waitingforafriendattheairport,Iinquiredaboutwhatflightsthereweretobeijing.这个结构我懂的我的问题是我看到一句话是WhenWaitingforafriendattheairport,Iinquiredaboutwhatflightstherewer

Question

【考前英语问问问,
Waiting for a friend at the airport,I inquired about what flights there were to beijing.这个结构我懂的
我的问题是我看到一句话是
When Waiting for a friend at the airport,I inquired about what flights there were to beijing.
请问为什么在用了 分词后前面还能加When,加了When后不是应该后面跟完整句子,不能缩写的吗?

Answer 1

是这样的.在时间和条件壮语从句中,如果从句的主语和主句的主语一致,或者从句的主语是IT的情况下,从句的主语和谓语都可以省略.例如.
if(this building is ） completed,this building would be the tallest in the city.