I was thinking about
C'est drôle, hier j'étais pas avec vous et je pensais à vous.
It’s funny, yesterday I wasn’t with you, but I was thinking about you.
— Le Petit Soldat (1963)
Je pensais à rejoindre l'armée.
I was thinking about joining the army.
I was thinking about other things.
Je pensais à comment ce serait si elle mourait.
I was thinking about what it would be like if she died.
— Assurance sur la mort (1944)
Je n'ai pas dormi, je pensais à ton fils.
I didn't sleep; I was thinking about your son.
— Tout sur ma mère (1999)
Je pensais à acheter un nouvel appareil photo.
I was thinking about buying a new camera.
Je pensais à ce que tu m'as dit.
I was thinking about what you told me.
I was thinking of something else.