Hi! I'm in a hurry, so I'll try to be brief and still make sense. A Brazilian asked me to check something he wrote. He said, "My parents got divorced when I was two. I've not remembered this time." I tried to explain that he can't use the present perfect this way - that he should say "I can't/don't remember this time.", but I don't think I convinced him. His argument is that he has heard, "She has won an Oscar." I told him that this means a recent past event. He wants a rule to support what I told him. Can anybody help me explain this to him?

Besides that, I told him that "I like my friends very much." is preferable to "I like very much my friends." Would any of you disagree with me?