Есть ли среди этих предложений Present simple?

His achievements since his accident have shown him to be a real-life superman.

They've already proved that it's possible for nerves in the spinal cords of animals to regrow and reconnect.

At first, he couldn't breathe without a machine, but now he can breathe on his own.

Спасибо.

А вот эти предложения Past Simple? But in 1996, when he appeared at Hollywood's Oscar ceremony, he went in a wheelchair.Not long ago, Christopher Reeve had everythingDisaster came in 1995 when he fell from his horse and broke his back.Since that moment I have never thought of giving upFrom their home, Christopher and his wife Dana spoke about their life since the accident..

Pasr Simple во всех, кроме Since that moment I have never thought of giving up. - здесь Present Perfect

... it's possible for nerves in the spinal cords of animals to regrow and reconnect.... but now he can breathe on his own.в этих частях ваших предложений - Present Simple.