• Have you talked to Peter?
• Has she gone to work?
• Have you been to London?
What time expressions are used?
We can do this with expressions such as: in the last week, in the last year,
this week, this month, so far, up to now, etc.
Which are the rules to conjugate/form the verbs?
First Form
The first form is the only form that changes depending on
who you're talking about. In the first person, second person,
and third person plural, it's all the same, but in the third
person singular, you usually add an s to the end of the verb.
Second Form
Most of the time, you just stick an "-ed" on the ends of
unsuspecting verbs to coerce them into a life of servitude as
second form citizens. What's wonderful about the second
form is that it's the same no matter whom you're talking
about.
Third From
You need to remember everything when it comes to third form verbs.
Some third forms are identical to their first forms, some to their second
forms, and some add an "-en" at their ends. Also, just to make everything
a little more difficult, the third form often needs a helping verb that's
conjugated appropriately.