If I were you I would simply ring your friend's doorbell and ask for your bike back.

如果我是你，我会按你朋友的门铃，索回自己的自行车。

《柯林斯英汉双解大词典》

If I were you, I would visit the Great Wall.

要是我就去长城看看。

youdao

If I were you, I would give some flowers to her.

如果我是你，我会给她一些花。

youdao

If I wanted you to care about an animal, I would do well to describe it as if it were human.

如果我想你关心动物，我就把它当成人一样描述。

耶鲁公开课 - 心理学导论课程节选

If I were you, I would let it go.

我要是你的话，我就不会追究了。

If I were 实战 - SpeakingMax英语口语达人

I think if you can imagine of the many, many,many colonies there were, that would have been the usual arrangement.

如果你们能想象,那里有无数的殖民地,这种情况一般是惯例

耶鲁公开课 - 古希腊历史简介课程节选

"The Theory of Flight" is not a depressing film about a dying woman. (But if I were you I would take some Kleenex.) Rather, this is a wonderfully absurd story about liberation and love.

CNN: Review: 'The Theory of Flight' soars with emotion

If I were you, I would make a list of possible jobs and rate each one on both measures.

WSJ: Ask Ariely: Dan Ariely on Where to Eat Lunch and Work

If I were you, I would focus my brand and competitive strategy against more agile and social challengers such as Yammer.

FORBES: Connect