混凝土配比表规范:he helped his grandma lay on her back,错在哪里？谢谢！

he helped his grandma lay on her back,错在哪里？谢谢！ --Mum,I helped my uncle clean his garden just now. Peter helped his friend to study English.(解释句子) If Mr Smith _______ here, he would have helped you. If Mr Smith _______ here, he would have helped you HE KNOWS HIS OINIONS.是什么意思? He finally confessed his crime. he him his she her he FELL of his bike he is on his way