(1) 如果主句是一般现在时,宾语从句根据实际情况用各种时态。
例如:My teacher says he will be back in a week. (一般将来时)我的老师说他将在一个星期后回来。
My teacher says he is watching TV. (现在进行时)我的老师说他正在看电视。
My teacher says he has seen the movie. (现在完成时)我的老师说他已经看过这部电影了。
(2)如果主句是一般过去时,宾语从句用相应的过去时态。
例如:My father said he was watching TV at that time.(过去进行时)我爸爸说在那个时候他在看电视。
My father said the he had already seen the movie. (过去完成时)我爸爸说他已经看过那部电影了。
注意:如果宾语从句是表示客观真理和规律的句子时,用一般现在时。
例如:Our teacher told us the sun is much bigger than the earth. (一般现在时)我们的老师告诉我们太阳比地球大多了。