Recently,I have had no energy.为什么要用这时态呢?

Recently,I have had no energy.为什么要用这时态呢? i have had an X-rey为什么have后面还要用had呢?i have an X-rey不行吗? I could look after myself when I have no energy we have had been having a lot of rain recently 用的是什么时态 为什么这么 I had no a busy weekend ＝ I didn't have a busy weekend 为什么? I had no a busy weekend ＝ I didn't have busy weekend 为什么? I had a headache,so I went to see a doctor为什么要用had.had有什么作用呢 I have had lunch为什么用两个have? 翻译recently i have had a discussion with my parents about whe how is everything going on recently?为什么要用recently? have you seen tony recently?no,but i ___ dinner with him on 我拥有我快乐I'm happy because I have had it. 为什么要用过去式?