七年级下册1.there be:就进原则 (与have区别)There is a pen and two pencils in the pencilbox.There are two pencils and a pen in the pencilbox.2.speak, say, talk, tell的区别 speak+语言 say+内容 to/with sbtalkabout sth sb sth tell a story 讲一个故事tellsth to