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Why can't you say "ayer he visto a Marcos"?

You can only use the perfect tense, "haber + perfect participle" when something is either very recent or is still ongoing. "Ayer", yesterday, is definitely not still going on, and it's no...
CS
Answered by Claire S. • Spanish tutor
4034 Views

How do I determine when to use the subjunctive?

When dealing with the subjunctive, there are two acronyms which, if committed to memory, will help you massively with learning in which situations the subjunctive needs to or needn't be used. When it is NOT ...
JH
Answered by Jakob H. • Spanish tutor
6774 Views

A circle with centre C has equation x^2 + y^2 + 2x + 6y - 40 = 0 . Express this equation in the form (x - a)^2 + (x - b)^2 = r^2. Find the co-ordinates of C and the radius of the circle.

We can express the equation of any circle in the form (x - a)^2 + (y- b)^2 = r^2 . The centre of the circle is then the point (a, b) and its radius is r . If we multiply out the brackets in the equation abov...
BK
Answered by Baran K. • Maths tutor
13335 Views

The line AB has equation 3x + 5y = 7. What is the gradient of AB?

The gradient of a line in the form y = ax + b, where a and b are some numbers, is the number a . So we need to get the equation 3x + 5y = 7 into the above form, with y on one side on its own! We first move t...
BK
Answered by Baran K. • Maths tutor
8977 Views

When should I use the perfect and imperfect tenses when talking about past actions?

For this question we will use the verb manger (to eat) as an example. The perfect tense is used to describe an action which took place once in the past. You can think of it as a single, completed action . EX...
LG
Answered by Laura G. • French tutor
4314 Views