that在名词性从句中可否省略

关于that的省略
一般情况下,宾语从句中的that是可以省略的.但在下列几种情况下,that一般不可省略.
①介词后面的that不能省.
Peter is a good student except that he is sometimes careless.彼得是好学生,只是有时粗心.
②并列连词and连接两个或两个以上宾语从句,第二个及以后的宾语从句中的that不省略.
My uncle says (that) he has served here for twenty years and that he is going to retire next month. 我叔叔说他在这儿工作已二十年了,下个月即将退休.
③主句谓语动词与that从句之间有插入语,that不可省略.
He said that, if he could manage it, he would come for dinner.
他说,如果他安排得好的话,他会来吃晚饭的.
④宾语从句中有其他从属连词时,that不能省略.
He told me that if it was necessary they would work all night.
他告诉我,如果需要的话,他们就干个通宵.
请及时采纳,不懂继续问( 天天在线 ）
(*^__^*) 祝学习进步! 谢谢!