1.This drug has no effect on fight against cancer.2. There has seldom been so much protest against the Bomb.句子中的against部分是干什么成分呢？

1.This drug has no effect on fight （名詞）against cancer. （定語）

2. There has seldom been so much protest （名詞）against the Bomb.（定語）

網友記住這兩條規則：

1. 修飾名詞的介詞短語是“定語”。

2. 修飾動詞的介詞短語是“狀語”。

以上兩句為定語；以下兩句為狀語。

He fought against the disease for a long time.

他同疾病做了長期的斗爭。

The group protested against the countrys foreign policy.

這個團體反對國家的對外政策。