i saw someone ----(进入)the building at ten last nightentering我记得书上有一句也是走进大楼 老师那时候说这是表示一个过程所以用原型这里为什么用进行时 有at ten这种固定时间就一定要进行时吗?

While(cross)___the street.I saw someone waving to me. While(cross)__the street,I saw someone waving to me i heard someone saw a UFO last night哪里错了?heard someone saw a 中改一个。 I saw saw saw i felt that for the first time someone else saw that what i saw改错,把saw后边的that 去掉,请问为什么 ,解释原因要详细 ,谢谢 i saw a saw saw a saw. SOMEONE I I get annoyed when I saw someone cutting in line.为什么cut要加ing?而不是原形? i saw a saw saw a I never saw a saw saw a I saw a saw swa a saw. I saw someone pick up rubbish and walk to a truck which was collecting rubbish outside是什么意思? I saw someone strange push his way into Mrs. Hill's before she could stop him.如何解释 i saw a man saw a saw with a saw 趣味翻译 I saw a saw saw a saw I saw a saw saw a saw的中文意思 I have never saw a saw saw a saw是什么意思? 翻译,先到先得.I saw a saw saw a saw.