This document discusses four present tenses in English: the present simple, present continuous, present perfect, and present perfect continuous. It provides the construction, use, and examples for each tense. The present simple is used for routines and facts, the present continuous for ongoing actions, the present perfect for unfinished time or unknown time frames, and the present perfect continuous for actions that began in the past and continue.

1. PRESENT TENTSES
- Present simple
- Present continuous
- Present perfect
- Present perfect continuous

2. Present simple
- Construction:
- Use:
- Example:
She walks 20 minutes everyday.
Negative: Don´t/doesn´t + verb
Positive: verb + “s”/”es”
Routines
Facts/ states

3. Present continuous
- Construction:
- Use: When the action is happening at the very moment.
- Example:
I am studying now.
Positive: + verb + -ing
Negative: + not + verb + -ing
Am
Are
Is
Am
Are
Is

4. Present perfect
- Construction:
- Use:
- Example:
I´ve been a teacher for five years.
Positive: + p.p
Negative: + not + p.p.
Heve
Has
Heve
Has
When time is not finished or we don´t know it

5. Present perfect continuous
- Construction:
- Use: When the action has started in the past and continue until now
- Example:
They have been talking for the last hour.
Positive: + been + verb + -ing
Negative: + not + been + verb + -ing
Has
Have
Has
Have