烦帮我把句子改写成含if虚拟条件句的复合句1、ImadealotofmistakebecauseIamcareless2、Sheisstillveryweak.SoIwon'tallowhertogotoschool3、Wedidn'tcatchthetrainbecausewewerelate.4、Hedoesn'thaveenough

　　烦帮我把句子改写成含if虚拟条件句的复合句

　　1、ImadealotofmistakebecauseIamcareless

　　2、Sheisstillveryweak.SoIwon'tallowhertogotoschool

　　3、Wedidn'tcatchthetrainbecausewewerelate.

　　4、Hedoesn'thaveenoughmoney,sohecannotbuyacar.

　　5、Xiaomingdoesn'tstudyhard;sohehastroublewithhisGET4.

　　把句子改写成含if虚拟条件句的复合句

　　对这些语法我一窍不通.