英语中 宾语从句 如果前面是某种时态 那引导词后面的时态又是什么呢 举些例子来

主句如果是一般现在时态从句可以是任何时态如：1,i think he is studying English.2,i think he has finshed English homework.3,i think he is going to study English tomorrow.4,pay attention to what the teacher said.主句如果是过去时态那么从句应该是表示过去的某种时态（过去时,过去进行时,过去将来时,过去完成时）.如.he said there were no classes yesterday afternoon.2.he said that he was going to take care of the baby.3,the teacher asked me if i could finish the task on time .4,he said that he had gone hong kong .如果主句是过去时态而从句式叙述某一客观真理和事实时从句用一般现在时.如,he said that her father is twenty-eignt years older than his.