我考虑过了，我决定辞职。

Wǒ kǎolǜguò le, wǒ juédìng cízhí.

I thought it over, I decided to quit.

你考虑一下买不买吧！

Nǐ kǎolǜ yíxià mǎi bù mǎi ba!

You should consider whether or not to buy!

我还在考虑要不要参加比赛。

Wǒ hái zài kǎolǜ yào búyào cānjiā bǐsài.

I'm still thinking over whether or not to participate in the competition.