黄岩区TZJ试卷初二第五单元英语作文

一，课文重难点讲解：
1. If you go to the party, you'll have a good time.
条件状语从句常由从属连词if,unless等引导。和时间状语从句一样，条件状语从句用一般现在时而不用将来时，尤其注意主语为第三人称单数时，动词使用单数形式。if引导的条件状语从句的结构：if+一般现在时，主语+将来时。
If you ask him, he will help you.
If it rains tomorrow, we won't go to the park.
I'll go with you if I'm free.
2. I think I'm going to wear jeans to the party.
If you do, the teacher won't let you in.
（1）do用作代动词，代替上文的动词部分“wear jeans to the party”,为避免重复。
（2）let in意为“让„„进来”
Windows let in light and air.
You must keep the door closed. Don't let the dog in.
3. Today is too early. If we have it today, half the class won't come.
（1）too“太„”,带否定含义。
（2）class此处指全班同学。half a/an, a half, half the 后接名词，表示“一半”.
He ran half a mile / a half mile in half an hour.
I have finished half the book.
注意表“半个„”或“„个半”时，half一词的用法。
half an hour 半小时，half a year 半年，one year and a half 一年半，one and a half years一年半，five and half days 五天半