《2025年优化探究同步导学案高中英语选择性必修第二册人教版》

[语法体会]
1. As a young doctor, John Snow became frustrated because no one knew how to prevent or treat cholera.
2. One theory was that bad air caused the disease.
3. The other was that cholera was caused by an infection from germs in food or water.
4. The truth was that the water from the Broad Street pump had been infected by waste.
5. That’s why we’ve given you the letter.
我的发现：
1. 句1中系动词became后接形容词作表语，句2、3、4、5均是黑体部分(即句子)作表语，为表语从句。
2. 句2、句3和句4属于that引导的表语从句，句5属于why引导的表语从句。

答案： 1.形容词 表语 2.that why