Present Perfect

Mam jeszcze trochę problemów z czasami.
Proszę o wytłumaczenie, dlaczego stosujemy taki czas, a nie inny.
A to zdania, z którymi miałam problemy:

1. My class are prepering a performance for the anniversary of the school so I have helped / been helping them a little.
Ja zaznaczyłam “helped” a ma być „been helping” dlaczego?

2. To zdanie już kiedyœ pisałam, ale chyba i tak nie zrozumiałam bo znowu Ÿle zrobiłam, dlatego napiszę jeszcze raz.
Something odd has happened / been happening here lately. (ma być been happening) We have seen / been seeing (have seen jest poprawnie, a ja znowu Ÿle zaznaczyłam)

3. We have observed / been observing him long enough to know that he’s just incompetent and irresponsible.
Oczywiœcie “have been observing”, a dlaczego tak?

4. I haven’t spoken / been speaking to Timmy for over two years.
“haven’t spoken”

Proponuję wybranie się do księgarni i kupno książki do gramatyki. Odpowiedź na pytania które cię nurtują są w każdej książce do gramatyki. Przeczytaj najpierw zasady użycia czasu zanim zaczniesz test. Na pewno zniknie 3/4 wątpliwości.

Something odd has happened / been happening here lately. (ma być been happening) We have seen / been seeing (have seen jest poprawnie, a ja znowu źle zaznaczyłam) some strange lorries moving in and out of the premises.

Zapomniałam dokończyć zdania.

Some of the points referring to the PRESENT PERFECT SIMPLE and PRESENT PERFECT CONTINUOS tenses:

1) My class are prepering a performance for the anniversary of the school so I have helped / been helping them a little.

... I have been helping them a little.

This means that your class and you are still preparing the performance, and you are still helping them.

... I have helped them a little.

In this case you would mark the accomplishment of your help - you wouldn't be helping them any more, although your class would still be preparing the performance.

2) Something odd has happened / been happening here lately. We have seen / been seeing some strange lorries moving in and out of the premises.

Something odd has been happening ...

The same situation as above - something odd started happening in the past and is still happening now

We have seen some strange ...

This means that you have experienced something, and all experiences are introduced by Perfect Simple tenses. Besides, you can't use the verb 'see' in the continuous form unless it means 'to go and visit someone'

3) We have observed / been observing him long enough to know that he's just incompetent and irresponsible.

We have been observing him ...

They may still be observing him and thanks to that they know that he's incompetent and irresponsible - one fact impacts on another.

4) I haven't spoken / been speaking to Timmy for over two years.

I haven't spoken to Timmy ...

You use PERFECT SIMPLE tenses for things which express facts, and not actions. This is the fact that you haven't spoken to Timmy, and not the action.

cos mi sie wydaje ze PP Continuous nie zawsze mowi o niedokonczeniu akcji.

We have been painting out house for 6 hours - przeciz tutaj nie wiadomo czy skonczylismy czy nie.

*our

If you think that the sentence you've posted may expresse something that is completed, then I must tell you you're wrong.

Translations:

We have been painting our house for 6 hours. means 'Malujemy nasz dom OD 6-ciu godzin'
We painted/were painting our house for 6 hours. means 'Malowaliśmy nasz dom PRZEZ 6 godzin'

However if you would like to indicate that something has just finished or was the case you can use PRESENT PERFECT CONTINUOUS.

I'm so dirty because we have been painting our house. which may mean that we are still painting it or has just finished painting it.

Tutaj obok "Forum" są także "Testy", "Gramatyka". Właśnie w tej gramatyce znajdziesz omówienie czasów. Napisane jasnym językiem specjalnie dla osób takich jak ty i z takimi pytaniami. Wejdź sobie tam ! Tutaj myślę parę osób właśnie odrobiło za ciebie zadanie domowe... Dajesz nam do wyboru różne możliwości a powinnaś je wybrać sama ! Nie wiem czy wysiłek tych dobrych osób da ci coś prócz zrobionego zadania domowego. Oni się tylko poświęcili ! Jak bedziesz miała jakieś wyjątkowe problemy to daj nam znać a wtedy postaramy się pomóc !