一、賓語(yǔ)從句用法
　　時(shí)態(tài)：　　1．主句用一般現(xiàn)在時(shí),從句可用任意時(shí)態(tài).可歸納為“主現(xiàn)從不限” 　　2．主句用過(guò)去時(shí),從句用過(guò)去某個(gè)時(shí)態(tài).可歸納為“主過(guò)從四過(guò)” 　　3．主句用過(guò)去時(shí),從句是科學(xué)真理、客觀(guān)常識(shí)、名人格言時(shí)用一般現(xiàn)在時(shí).　　4．情態(tài)動(dòng)詞could/would用于,“請(qǐng)求”,表示委婉、客氣的語(yǔ)氣時(shí),從句不受主句的約束.就是主句是一種過(guò)去時(shí)，從句為各種相應(yīng)過(guò)去時(shí)態(tài)。He wanted to know what the manager had said at the meeting. 　　He wanted to know who hadn’t passed the exam. 　　He wanted to know when she would leave this building. 　　He wanted to know why she cried last night. 　　He wanted to know where she was going to study. 　　He wanted to know which student was his partner in the short play. 　　He wanted to know if (whether) Tom could play basketball with him that morning. 　　He wanted to know how she managed to solve the problem.在例子中，當(dāng)主句是過(guò)去時(shí)態(tài)時(shí)（一般過(guò)去時(shí)，過(guò)去進(jìn)行時(shí)，過(guò)去將來(lái)時(shí)，過(guò)去完成時(shí)），從句根據(jù)不同情況必須使用過(guò)去時(shí)態(tài)的一種，（大自然的現(xiàn)象和真理除外）。