Tim is looking at an aeroplane.帮我分析下这句子的句型好吗?

Tim is looking at an aeroplane.帮我分析下这句子的句型好吗? where is Sally? Tim is looking at an aeroplane. Here is another photograph.句子中的be（is）在句子中的作用是什么? Tim is looking at an aeroplane.可以把 is 如果不行,为什么 I wasn't go to school是错的呢?这两句结构不是一样的吗? 英语翻译Tim is looking at the airplane flying over the rive,对么 Tim is looking at the airplane flying over the rive.这句话语法对么这里looking sth doing 可以么 还是用WATCH 或者SEE .Tim正在看飞机在河上飞过. Helen -----a good job.A.is looking for B.is looking after C.is looking at D.is looking up She is looking at her photos. Tom is looking at the backboard.祈使句 he is looking at the blackboard ------(happy) He is looking at the picture. I want is looking at you quietly. He is looking at me _______(angry) Tim is_______ his book everywhere,but he can ’ t _____ it.A.looking at; findB.looking for; find C.finding; look forD.looking for; see 连词成句 at,the,shopping,Tim,mall,is Jim is better at marh than tim 改为同义句 我的这篇英语短文有错误吗?One day,Tim and Ben are going to shopping in the supermarket.They are looking at a man in the supermarket.Tim asks,What is he taking? He is taking a bottle of juice.Ben says.Then,the man is waiting for a bus o John is （ ）his book.It is lost.填looking after,looking at,looking for,looking with. he is looking at the dive (对 is looking at 提问)