is是系动词，后面可以接名词和形容词。如：He is a teacher。他是一名教师；The shirt is very beautiful。那件衬衫特别漂亮。
is的用法口诀我用am，你用are，is连着他，她，它；单数名词用is，复数名词全用are。变疑问，往前提，句末问号莫丢弃。变否定，更容易，be后not莫忘记。疑问否定任你变，句首大写莫迟疑。
is造句示例It is possible to cure psoriasis.牛皮癣是可以治好的.Russian spelling is phonetic.俄语的拼法是音形一致的.She is always worrying about little things.她老是为小事烦恼.This room is insulated against noise.这个房间隔音.A lie which is half a truth is ever the blackest of lies.真假参半的谎言最险恶.Your behavior is causing our name to be dragged through the mud.你的所作所为已经损坏了我们的名誉.She is as proud as a peacock.她十分骄傲.This book is by John, Jones, et al.这本书的作者是约翰 、 琼斯等人.The escapee's turnup is expected soon.预料很快就会出现逃亡者.It is vain to resist.抵抗是没用的.When money falls in value, there is no encouragement to save.货币贬值时, 就无法鼓励人们储蓄.His performance at the concert last night proved that he is in the top flight of international pianists.昨晚他在音乐会上的演奏证明他在国际钢琴家中居首位.There is much noise in this radio.这收音机杂音很多.She is very virulent about her former employer.她对她过去的老板恨之入骨.The fence is strategically sited to prevent anyone getting onto the beach.这个围栏的地点选择得很有策略,可以阻止任何人到海滩上.
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