⑴连接词：①连词that引导由陈述句变来的宾语从句。 如：I know (that) he’s a teacher. ②连词if或whether引导一般疑问句、反意疑问句或选择疑问句变来的宾语从句。 如：Could you tell me if/whether it snows in winter in Australia?③连接代、副词（即疑问词）引导由特殊疑问句变来的宾语从句。 如：Please tell me how you go to school.
⑵语序：宾语从句要用陈述语序。 如：Do you know where Tom lives?
⑶时态：①如果主句为一般现在时、一般将来时，则宾语从句中时态不限，根据实际情况使用所需要的时态。 如：I hear Joan left for Beijing yesterday. I hear Joan has left for Beijing. I hear Joan will leave for Beijing. ②如果主句为一般过去时，则宾语从句应与主句中的时态保持一致，只用过去时态的适当形式。 如：Kate said she was watching TV this time yesterday. Kate said she was going to school soon. Kate said she had seen the film before. ③如果宾语从句表示的是客观真理和普遍事实，则一般现在时保持不变。 如：Miss Hu said that the earth goes around the sun. ④如果宾语从句是when疑问句或带有时间状语从句，则when疑问句或时间状语从句中的一般过去时不变。 如：The teacher wanted to know when the girl was born. Tom said he had worked here since he left school. ⑤如果宾语从句中含有过去具体的年、月、日作状语，则其一般过去时保持不变。 如：I heard Lucy was born in 1986.
⑷否定前移：如果主句的谓语*是think, guess, believe等表示猜测的*且接有否定的that宾语从句，常将否定词提前到主句中。 如：I don’t think that Alice is English.（我认为艾丽斯不是英国人。 ）
⑸复合结构：在think, find, make等接有复合宾语的*之后，为避免句子头重脚轻或关系模糊，常用it作形式宾语，而将真正的宾语从句放在宾语补足语之后，即用“及物*+it+宾语补足语+宾语从句.” 结构。 如：I think it important that we should learn English well.
