French language Q&A Forum

Or there must be a preposition in between noun and 'penser', which means only either 'penser à + noun' or 'penser de + noun' ?

If 'penser+noun' exist, how to differentiate 'penser+noun' and 'penser à + noun'? 

Let's say I have a Mathematic problem and I am thinking/reflecting on it, hoping to come out with a solution. It should be 'penser' the mathematic problem or 'penser à' the mathematic problem?

If I finally think of the solution, is it correct to use 'penser à' the solution?

Thank you

Just to be clear, in expressions like : 'Je vais au cinéma pour voir un film' ... presumably this implies that it is wrong to just say 'Je vais au cinéma voir un film'

Je pensais qu'on ne peut pas mettre ensemble deux verbes déjà conjugué. Est-ce que c'est  la Gerondif par chance ? Vous avez dit; form of verbs with l'Infinitif - c'est pourqua j'ai le question.  (pardon de mes erreurs grammaticeux)

merci,

Solveigh