七年级英语上册Unit1-6句型转换专练怎样将一个单数句子转换为复数句子看主语，将句子中单数主语转变为复数。thisthesethatthoseIwehe/she/ittheyeg:Thisismysister.Thesearemysisters.Sheismyteacher.Theyaremyteachers.看谓语，把be(amis)改成are,把has改为have，等。eg：Iamaboy.Weareboys.ShehasanEnglishbook.TheyhaveEnglishbooks.看名词，把单数名词改成相应的复数名词，把不定冠词a/an去掉。eg:Thisismysister.Thesearemysisters.Itisawatch.Theyarewatches./Theyaresomewatches.疑问词（whatwhowhere）,介词短语（inEnglish）不变。eg:WhatsthisinEnglish？WhataretheseinEnglish?练习：（将下
