【正文】
I took yesterday. letter _______ I received from yesterday is very important. f. Where is the scientist _______gave us the talk yesterday? that which who 三、 If引導(dǎo)的條件狀語從句 : ______ 要用 _____,主句用 ______. 3. 結(jié)構(gòu) 主句(一般將來時(shí)) +if從句(一般現(xiàn)在時(shí)) 如果 現(xiàn)在時(shí) 將來時(shí) : a. If he (miss) the bus, he (take) a taxi. b. We (go) to the park, if it (rain) tomorrow. c. What you (do), if you (spend) all the money? d. I’m sure if he __ (go) to the party, he __ __( have) a great time