Question

When do we use present perfect tense?
a)To describe a situation that started in the past and continues to the present.
b)To express habits.
c)To describe an action that is going on at this moment.
d)To refer to an unspecified time between ‘before now’ and ‘now’.

Answer 1

Hint: The tense of a sentence denotes a time, whether it is the time now, i.e. present, time that has gone, i.e. past or the time that is to come, i.e. future. Present perfect tense combines past and the present both.

Complete answer::
To find the correct solution you should first look into each of the options, that way you can understand what would be the correct solution.
Now, let us look into the options –
Explains the present perfect is used to indicate a link between the present and the past. The time of the action is before now but not specified, and we are often more interested in the result than in the action itself.
Explains the simple present tense, which refers to habits or general truths, like – the earth is round, or I exercise every morning.
Explains the present continuous tense that describes an ongoing action, like that of – I am baking a cake right now, it does not explain the perfect tense, which refers to a completed action.
Explains the present perfect continuous tense that is it shows that something started in the past and is continuing at the present time.

So, by the above explanation we can see that the correct solution would be an option – ‘a’

Note: Be familiar with the usage, concept and rules of tenses. That way you will find it easier to solve the above question.