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How do I know when to use these tenses: imparfait, passé simple and passé composé?

The imparfait and passé simple work together to narrate the past: imparfait is used to describe actions that took place over a certain period of time in the past, and it is used for description, whereas the ...
MC
Answered by Mathilde C. French tutor
2777 Views

When do I use 'ser' and 'estar'?

This is one of the most complex questions for Spanish learners, as both verbs mean 'to be'. This can cause confusion even for advanced learners, and so if you study it well now it will set you up with a soli...
DH
Answered by Daisy H. Spanish tutor
2472 Views

What's the value of the normal force of a vehicle on a convex bridge? What about a concave one?

For a vechicle placed on a convex bridge: N=mg-F cf. For a vehicle placed on a concave bridge: N=mg+F cf. Where mg is the gravitational force and F cf is the centrifugal force.
DM
Answered by Dan M. Physics tutor
2942 Views

How closely is music linked to a linear progression of time?

Performance of music clearly takes place within a window of time, but different composers have experimented with different approahces to temporality in music. Some composers use time as a way of building tow...
FC
2108 Views

What makes the Production Possibility Frontier shift to the right?

The production possibility frontier is the reflection of the maximum productive potential of an economy. Any point on the curve shows a combination of two goods that an economy can produce given that all res...
VT
10962 Views