PRESENT PERFECT TENSE 1

Este tempo verbal é utilizado para expressar algo que aconteceu no passado, mas de alguma forma está ainda relacionado ao presente.
A estrutura segue o modelo: pessoa + verbo auxiliar have/has + verbo principal no
Past Participle.
I have done my homework.
He has done his homework.
I have eaten my dinner.
She has eaten her dinner.
Para se ter uma melhor idéia de como o Present Perfect se refere ao passado e ao presente ao mesmo tempo, podemos encontrar uma sentença similar no Simple Present na voz passiva, preservando o significado.
My homework is done (now).
His homework is done (now).
Este tempo verbal pode também expressar conseqüências de eventos passados, no presente.
I’ve had financial problems …exibir mais conteúdo…

3. Periods of time can be shown with or without for:
I've lived in Phoenix for nine years. /
I've lived in Phoenix nine years.
They've been here for two days. /
They've been here two days.
He's had his car for exactly one week. /
He's had his car exactly one week. 4. Some verbs are "one time" verbs: they cannot usually be used to show an action or situation that continued: not this: I have *moved to Phoenix for 10 years. but this: I have lived in Phoenix for 10 years. not this: He has bought his new car since last Tuesday.
But this: He has had (or owned) his new car since last Tuesday.
In the examples above, move and buy are
"one time" verbs: the action or situation that they describe did not continue. In the situations above, the "one time" verbs should be past tense, not present perfect tense. Also, in order to show the action that continued, a different verb is needed.

Present Perfect Continuous Tense
I have been singing
How do we make the Present Perfect Continuous Tense?
The structure of the present perfect continuous tense is: subject + auxiliary verb + auxiliary verb + main verb have has been base + ing
Here are some examples of the present perfect continuous tense: subject auxiliary verb auxiliary verb main verb
+ I have been waiting for one hour.
+ You have been talking too much.
- It has not been raining.
- We have not been playing football.
? Have you been seeing her?
? Have they been doing