OG10语法268题及GWD22语法总结日志(四)
3. Some bat caves, like honeybee hives, have residents that take on different duties such as defending the entrance, acting as sentinels and to sound a warning at the approach of danger, and scouting outside the cave for new food and roosting sites.
A. acting as sentinels and to sound
B. acting as sentinels and sounding
C. to act as sentinels and sound
D. to act as sentinels and to sound
E. to act as a sentinel sounding
1.平行构造：
此题年夜平行里小平行
A．平行构造的形式对称 ==》现在分词和不定式不对称。
B.平行构造可以有多个条理，此处便是 such as A, B1 and B2, and C1.其中 A，Ｂ，Ｃ年夜平行， B1 and B2;是小平行。
2.单双数同等：
Residents that… acting as +双数名词对应，默示统一内涵的工具单双数同等。
3.连结原句意思
平行构造改身分词润色构造会窜改原句的意思。
4. Such as / Like用法：
A like B. A和 B是同类的事物举行比较。
A，such as B , C B和Ｃ是对Ａ所包括事物的列举。
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