如果你想要去救某人，你可以说：
"I'm going to rescue him."
"I'm going to save him."
"I'm going to help him."
这些都是常用的表达方式，来源于英语的常用语。
例句：
"I saw that he was in trouble and I knew I had to rescue him."
"I couldn't just stand by and watch him drown, so I jumped in the water to save him."
"She was trapped in the burning building and I knew I had to help her escape."
中文翻译：
"我看到他有麻烦，我知道我必须去救他。"
"我不能眼睁睁地看着他淹死，所以我跳进水里救了他。"
"她被困在着火的建筑里，我知道我必须帮助她逃出去。"