1.連接詞
1.從句為陳述句，常選擇連接詞that或?qū)hat省略，直接與主句相連。
2.從句為一般疑問句，常選擇連接詞if或whether。在 whether … or not 結(jié)構(gòu)中不能用 if 替換。
3.從句為特殊疑問句，常選擇what,when,where,which,who,how等的疑問代、副詞作連接詞。
注意：當(dāng)who為主語時(shí)，句式為：who+謂語+其他
2.判斷時(shí)態(tài)情況：
1.主句是一般現(xiàn)在時(shí)，從句為各種時(shí)態(tài)情況。
2.主句是一般過去時(shí)，從句為各種相應(yīng)過去時(shí)態(tài)注意：從句描繪客觀事實(shí)，用一般現(xiàn)在時(shí)。
3.關(guān)系代詞：that，who，whom,whose,which
eg: 1. The teacher told the children that the sun____ round.
A. was B. is C. were D. are
2. I believe that our team____ the basketball match.
A. win B. won C. will win D. wins
3. I don’t know____ to visit the old man.
A. whether B. if C. that D. who
4.The soldiers soon reached( )was once an old temple( )the villagers used as a school.
A.which;where B.what;which C.where;which D.what;where
答：選B，動(dòng)詞reach后接賓語從句，從句缺少賓語，where不可，which引導(dǎo)賓語從句時(shí)表疑問含義“哪一個(gè)…”而此句中并非疑問含義，不知道哪一座廟宇，而是用what從句表陳述含義，意“過去的一座舊廟宇”;temple后為對(duì)其修飾的定語從句，用關(guān)系代詞which代替，并在從句中作動(dòng)詞used的賓語，use sth. as…“把…用作…
賓語從句用作賓語。如：
Do you know where he lives?
定語從句相當(dāng)于一個(gè)形容詞，用于修飾前面的名詞。如：
The student who answered the question was John. 回答問題的學(xué)生是John.
This is the man whom he is looking for.
Do you know the girl who is in red?
語法~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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