3、s)说明2:“介词短语”表示“地点”,即上册所讲的“方位介词”。也可把介词短语置于句首。学过的有:on in under between(…and)nexttobehind infrontof 如:Thereisaclockonthewall.Underthetreetherearesomegirls.(3)Therebe句型的一般疑问句及其回答。一般疑问句把be动词提前。如:Isthereaneggonthedesk?Yes,thereis/No,thereisn’t.Arethereanybirdsinthetree? Yes