Unit19语法高一英语课件

It用法1Itis+名词/形容词+that从句(that从句是真正的主语）2Itis+名词/形容词+todosth3Itis+名词/形容词+for/ofsbtodosthItisverynecessary____ustolearnEnglishwellItiskind____youtohelpme4it做形式宾语make/think/believe/find/feel+it+todosth/that从句我认为学好英语是很必要的，Ithink/find______________________Englishwellforofitnecessarytolearn5Itisnogood/usedoingsth做某事没有好处/用处Itisuselessdoingsth做某事没有用处Itisawasteoftimedoingsth做某事是浪费时间7Itis+一段时间+since+从句（从句用一般过去时态）我来这儿三年了，I’vebeenhereforthreeyearsItisthreeyearssinceIcamehere6Itistimetodosth该做某事了ItistimetogetupItistimeforsbtosth某人该做某事了Itistimeforustogetup8It+is/was+thefirst/secondtimethat…(谓语动词用完成时态）ItisthefirsttimeinhistorythattwoNobelPrizeshavebeenawardedtothesameperson9Ittakessbsometimetodo…IttookMary20minutestochooseasuitabledressfortheparty10It+is/was+一点时间+when…Itwasfiveo’clockwhengotthere11Ithappenedthat+从句“碰巧……”Ithappenedthatshewasn’tinthatday12It+issaid/believed/thought/reported/known+t，