I left out the following sentences.

Can you please check them? I hope they are the last on the same subject.
I really rely on your invaluable help.

1) Caliban feels like a slave. He has o obey Prospero's orders because of Prospero's magic powers.
There is a maleficent magic and a beneficent one.
2) Caliban claims to won he island which belongs to me because Sycorax has left it to him but Prospero has taken it from him.
3) In his turn, Caliban loved Prospero back. He would show him all the features of the island. (Also: he showed him all the features of the island).
4) You are required to write a cohesive ten-line paragraph using your own words. You limited yourself (not restricted yourself) to repeating my notes word for word without revising (reworking them).
5) When Prospero and Caliban first met, Prospero took care of him.
Prospero was his first king and now he pens him up like a farm animal, so that he can't go anywhere he wants on the island.
6) Now Miranda calls him a liar, who can be influenced only by punishment and not by kindness.
7) The play can be regarded not only as an admonition against the risks of English expansion abroad, but also as an exhortation against the power of the supernatural.
Miranda helped him find words (also "the words") to make his point understandable.

Buona Pasqua!

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1. sp ~~> to

2. ... claims to own the island ...

3. I wondered about the tense "would show" before, but neglected to ask about it. Does that verb indicate an intention? Or is it supposed to be a substitute for a future action? Unclear to me.

4. For the second sentence, I'd write this: You chose to simply copy my notes word for word, with no ideas and words of your own.

5. Present tenses needed...

6. Rather awkward ~~> ... calls him a liar, who can ...
It'd be better to delete the comma and change "who" to "that", I think.

7. Present tense needed in the second sentence here.

1) The sentence is grammatically correct, but there is a minor error in the word "o". It should be "to". The corrected sentence would be: "He has to obey Prospero's orders because of Prospero's magic powers." To check this sentence, you can review the use of "to + verb" to indicate obligation or necessity.

2) The sentence is grammatically correct, but there is a typing error in the word "won". It should be "own". The corrected sentence would be: "Caliban claims to own the island which belongs to him because Sycorax has left it to him but Prospero has taken it from him." To check this sentence, you can verify the correct use of possessive pronouns and the correct form of the verb "claim".

3) The sentence is grammatically correct, but there is an alternative phrase that can be used. Instead of saying "He would show him all the features of the island," you can say "He showed him all the features of the island." Both forms are acceptable. To check this sentence, you can review the use of past tense verbs and pronouns.

4) The sentence is grammatically correct, but there is a more natural way to express the idea. Instead of saying "You are required to write a cohesive ten-line paragraph using your own words," you can say "Please write a ten-line paragraph that is cohesive and uses your own words." This version sounds more conversational. To check this sentence, you can review the use of imperative sentences and the correct order of adjectives.

5) The sentence is grammatically correct. To check this sentence, you can review the verb tenses and the use of comparison.

6) The sentence is grammatically correct. To check this sentence, you can review the use of adjectives and the correct formation of comparative and superlative forms.

7) The sentence is grammatically correct. To check this sentence, you can review the correct use of prepositions and the meaning of the word "admonition".