1. We have painted our house gren.

2. Our house have been painted green.

3. Our house is painted gren.
( #1 is an active voice sentence.
#2 is a passive voice sentence of #1. In #2, action is stressed. #3 is a passive voice sentence of #1. In #3, state is stressed. Is this explanation correct?)

4. He has closed the shop.
5. The shop has been closed by him.
6. The shop is closed by him.
( #4 is an active voice sentence.
#5 is a passive voice sentence of #4. In #5, action is stressed. #6 is a passive voice sentence of #4. In #6, state is stressed. Is this explanation correct?)

1. We have painted our house green.

2. Our house has been painted green.

3. Our house is painted green.
( #1 is an active voice sentence. yes
#2 is a passive voice sentence of #1. yes
In #2, action is stressed.
#3 is a passive voice sentence of #1. In #3, state is stressed. Is this explanation correct?) Both 2 and 3 are passive voice sentences, and I see no difference except the specific verb tenses.#2 is in the present perfect, passive, and #3 is in the simple present, passive.

4. He has closed the shop.
5. The shop has been closed by him.
6. The shop is closed by him.
( #4 is an active voice sentence. yes
#5 is a passive voice sentence of #4. yes
In #5, action is stressed. #6 is a passive voice sentence of #4. In #6, state is stressed. Is this explanation correct?)

Again, in sentences 5 and 6, I see no difference (both are passive) except for the specific verb tenses.

Yes, your explanations are correct.

1. Sentence #1 is in the active voice. It states that the subject (we) performed the action (painted) on the object (house). The emphasis is on the action itself.

2. Sentence #2 is in the passive voice. It is a transformation of the active sentence #1, where the object (house) becomes the subject, and the subject (we) becomes the agent mentioned with "by" (by us). It emphasizes the action being done to the house rather than who performed the action.

3. Sentence #3 is also in the passive voice, just like sentence #2. It conveys the same meaning but focuses on the resulting state rather than the action itself. The emphasis is on the fact that the house is now painted green.

4. Sentence #4 is in the active voice. It states that the subject (he) performed the action (closed) on the object (shop). It emphasizes the action itself.

5. Sentence #5 is in the passive voice, as a transformation of sentence #4. The object (shop) becomes the subject, and the subject (he) is mentioned with "by" (by him). It emphasizes the action being done to the shop rather than who performed the action.

6. Sentence #6 is also in the passive voice, like sentence #5. It conveys the same meaning but focuses on the resulting state rather than the action itself. The emphasis is on the fact that the shop is now closed, and the person mentioned closed it.