一致性
1、主句的时态（一般现在时,现在进行时,现在完成时）；从句根据实际情况确定时态
2、主句：过去时态（一般过去时,过去进行时）；从句：过去时态（一般过去时,过去将来时,过去完成时）
不一致性
1、主句的谓语动词与从句的谓语动词同时发生,从句的谓语动词用一般过去时或过去进行时
例如：He said he worked in a factory.
My brother told me father was writing a letter then.
2、从句的谓语动词发生在主句谓语动词之前,从句的谓语动词用过去完成时
例如：He said he had seen the film before.
3、从句的谓语动词发生在主句谓语动词之后,从句的谓语动词用过去将来时,过去将来进行时,过去将来完成时
例如：He said he would go with us.
He said he would be visiting a freind of his the next morning.
He said he would have learned 3000 Enlish words by the end of this term.
4、如果宾语从句表示的是一般真理,就不受时态呼应的限制.