Speak in the present perfect.
You use it all the time to say for example,
"I've been working"
"We've been traveling"
"What have been doing?"
It's all about the been!
To use this verb tense (the present perfect indicative) all you need to do is connect ter with any past participle of a verb. Like this:
What have you been doing? >> O que você tem feito? (past participle of FAZER = feito)
* use this to start up a conversation.
Have you been going to class? >> Você tem ido a aula? (past participle of IR = ido)
* notice that all past participles end with and 'o'!
Have you been talking to him? >> Você tem falado com ele? (past participle of FALAR = falado)
*notice that TER is always in the present.
I haven't been going out much these days >> Eu não tenho saido muito esses dias. (past participle of SAIR = saido)
Lots has been happening. >> Muita coisa tem acontecido. (past participle of ACONTECER = acontecido)