Breakdown of Quando adicionares o produto ao carrinho, tens de pagar.
ao
to the / at the (m.sg; f.sg à, m.pl aos, f.pl às)
quando
when
pagar
to pay
ter de
to have to
Questions & Answers about Quando adicionares o produto ao carrinho, tens de pagar.
Why is it adicionares instead of the present tense adicionas?
The word Quando (when) triggers the Future Subjunctive when talking about an action that hasn't happened yet. Even though in English we use the present tense ('when you add'), Portuguese uses the Future Subjunctive to show that this is a future possibility.
How do you form the Future Subjunctive for a regular verb like adicionar?
For regular verbs, the Future Subjunctive is based on the infinitive. To get the tu form (you), you simply take the infinitive adicionar and add the ending -es, giving you adicionares.
Why does it say ao carrinho instead of just a carrinho?
The verb adicionar (to add) requires the preposition a (to). Since carrinho (cart) is a masculine noun, we combine the preposition a with the definite article o (the) to make the contraction ao.
I have seen ter que used for 'have to'. Why does this sentence use tens de?