LIE AND LAY
The verbs lie and lay very often confuse students. The verb lie (lay, lain, lying) is intransitive and means “ estar deitado ou deitar”: “I had some headache, so I lay down for a while”. It’s important not to mix-up (confundir) with lay (laid, laid, laying) which is transitive and means “colocar horizontalmente”: “She laid her books on the desk and made a phone call.”

A FEW MORE IDIOMS
Walk away from an unpleasant situation unscathed: Sair de uma situação ileso.
To pour the footings: Por cimento, cimentar
I just blundered in here out of the rain: Eu caí aqui de pára-quedas