Grammar:Present Perfect Continuous l What is the common structure?1.Solar racers have been coming to Australia for years for the world solar car challenge.have been designing solar racing cars for a long time.3.I have been building a new car with a team from Queensland university.have been buildinghave been cominghave been designingWhat is the common structure?*主主语语+have/has been+现现在分在分词词*肯定句：肯定句：主主语语+have/has been+动词动词ing形式形式*否定句：否定句：主主语语+have(has)not been+动词动词ing形式形式*疑疑问问句：句：Have(Has)+主主语语+bee
