When we see airline pilots wearing uniforms at the airport.为什么句子中的wear要加ing

When we see airline piots --（wear） uniforms at airport When we see airline pilots wearing uniforms at the airport.为什么句子中的wear要加ing When can we see When can we see 着急 翻译：We were in such an anxious rush when we left that we forgot the airline tickets. what will we see when we ground AIRLINE when we see a granny crosses the when can we see the sun? we were in ——when we left that we forgot the airline ticketsuch an anxious rush这是名词短语么? When we see a very sick man .we should call ( ) ). we can not help _________(laugh)when we see him. when we use public document ,where do we see them we were in when we left that we forget the airline tickets.we were in when we left that we forget the airline tickets.A RUSH SO ANXIOUS B A SUSH ANXIOUS RESH c SO AN ANXIOUS RUSH D such an anxious resh We were in ——when we left that we forgot the airline tickets.A.a rush so anxious B.a such anxioWe were in ——when we left that we forgot the airline tickets.A.a rush so anxiousB.a such anxious rushC.so an anxious rushD.shch an anxious rush为 what a lie is when we see it.如何翻译 when autumn comes ,we can see many ____ (fall)leaves? We see her when she p------the classroom