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Both 'ser' and 'estar' can be translated as 'to be'. So, when you need to use 'to be', you need to ask yourself a question to know which one to use: Am I talking about the way an object is all the time ( WHA...

The asymptotes of a curve are the lines or curves that approach a given curve very closely without actually touching it. They make curve sketching much easier. You will probably only have asymptotes that are...

The passé composé is always used once an action is completed. For example, when saying 'yesterday I went to school', you would use the passé composé - 'Hier, je suis allée au collège'. The imperfect tense is...

Pythagoras was a Greek philosopher who discovered that in a right angled triangle (triangle with one angle 90 degrees) the hypotenuse squared , c 2 , was equal to the sum of the other sides squared, a and b....

Forming the imperfect subjunctive is easy, on the condition that you know how to form the preterite (in 3 rd person plural, e.g. hablaron, comieron…) Let’s start with a regular verb: hablar. We go to the 3 r...