I had to be treated with radiation following by treatment with chemicals.答案是把following改为followed,为什么这样改,原句哪儿错了?现在分词和过去分词有哪些区别啊,我老是分不清.
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与本题相关的现在分词和过去分词的区别是：现在分词表示主动，过去分词表示被动。关键在于找准逻辑主语才能准确判断主动还是被动，本句逻辑主语是treatment with radiation放疗 （=treated with radiation） 它被treatment with chemicals化疗所跟随,是被动关系.所以用followed.