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There are many different forms for the imperative in Spanish using the indicative and subjunctive moods and for informal and formal forms. Informal The 'tú' form' Simply take away the 's' from the ending of ...

Si clauses are used to introduce a hypothetical action that decides another action. The tense used in the hypothetical situation decides the tense that follows. Present tense - Present tense S'il fait beau, ...

A way of remembering the difference is to think that the word 'perfect' comes from the Latin 'perfectus' meaning ' completed ' while 'imperfect' will therefore mean not yet completed or on-going . The perfec...

In Physics, there are two types of numbers: scalars and vectors. Scalars are just a normal number, as we are used to. Vectors also have a direction associated with them. Thus, variables like temperature and ...

Differentiation is defined as the rate of change of a function. Imagine we had a function f(x), which we shall let equal x 2 . We all know what the graph of x 2 looks like. The derivative of x 2 is 2x. This ...