i'm very much afraid that your son may be involved in the crime..是同位语从句吗,very afraid可以吗

i'm very much afraid that your son may be involved in the crime..不是同位语从句.afraid是形容词,其后面不能有同位语,that引导的是形容词afraid的宾语从句.又如：I'm glad that I have seen your sister....