質問ありがとうございます。
こう言えますよ、
❶Had he been alive...
①Had she been alive...
(彼/彼女 が生きていたら…)
❷If he were here....
②If she were here....
(もし彼/彼女が ここに居てくれたら…)
例えば、
Had he been alive, he would’ve given me great advice.
(彼が生きてたら、彼はきっと私に良いアドバイスをくれただろう)。
If she were here、she would’ve give me the guidance I needed.
(もし彼女がここに居てたら、きっと必要な導きをくれただろう)。
と言えますよ、参考に!