I thought you could do it better.

我以为你的表现会更好。

youdao

This homework is all right but you could do it better.

这份家庭作业还算可以，其实你可以做得更好。

youdao

Think About How It Could Have Been Better: What would you do differently if you had it to do over?

反思一下如何能得到更好：如果再做一次的话你会有什么不同的做法？

youdao

Thus, the place to start for new entrepreneurs is to look for a successful business (not a failing business) in your domain and think about how you could do it better.

FORBES: Imitation With Innovation Reduces Risk in Startups

You could do much better, it was cheaper, to get tea bags, 100 for 99 cents, and one spoonful, one cupful of sugar, and so you drink a lot of iced tea.

NPR: Child Hunger: Nutritious Food Tough To Afford