过去进行时用法详解 The reporter said that the UFO was travelling east to west when he saw it.那位记者说他看见UFO时，它正由东向西飞行。I dont think Jim saw me; he was just staring into space.我想吉姆没看见我;他当时正在凝视天空。构成过去进行时常由助动词be的过去时was/were+现在分词构成。was not常简写为wasnt, were not简略为werent
