新概念第四册，lesson2 片段讲解
1／why you may wonder？

110'

2／because they destroy so many insects
destroy＝处理＝to kill animal（尸体）
destroy sb's confidence／hope／faith
例子：destroy hostile faith is the best of tactics

180'

89'

3／insects would make it impossible for us to live in the world；they would devour all our crops and kill our flocks and herds，if it were not for the protection we get from insect－eating animals
a／it 形式宾语；for us to live in the world 真正的宾语

93'

b／insect would／they would中的would＝虚拟语气

162'

例子
若不是中国在第二次世界大战中拖住了大量的日本军队，苏联将面临两线作战；并且，世界的格局远非今天这样。
the suviet union would have to fight on two fronts；and world pattern would far from it being so，if it were not for the resistance china got from Japanese army during the second world war