问题描述：
对于be concerned about ,be fond of 等词组什么时候用be什么时候不用be动词
问题解答：
我来补答
解题思路： be + 形容词 在句中是系表结构，如果在句中需要形容词作状语、定语或补语，则不用be动词。
解题过程：
be concerned about ... 担心...，类似于 be worried about...
be fond of... 喜欢、喜爱...
例如：
1. Mother was concerned about him when he came late home. 、
2. Most of the students are fond of pop music.
这两个句子用的是主系表结构，使用了be 动词的不同形式。
又如：
1. Concerned about his son's safety, mother went out to look for him. (形容词短语在句中作原因状语)
2. The photos of the famous actress were bought by those fond of her. (形容词短语在句中作定语)
明白了吗？若有问题请继续讨论啊，祝你节日快乐！！
最终答案：略
