Thank you very much for your help.

Here are some more sentences I'm doubtful about.

1) Being a Renaissance man, Hamlet doubts the existence of an afterlife.
2) He doubts suicide/ He has doubts about committing suicide/ He is doubtful about suicide. He is not sure of what will happen after death. Every man (better: Everyone one/each of us) is scared of what will happen after death.
3) The hero usually has (goes through is also OK?) a period of doubt in which (during which) he projects (correction: plans) his revenge.
4) Hamlet is a revenge tragedy because it includes (not respects) all the features of the revenge tragedy present in Seneca.
5) Hamlet decides to have vengeance for (?) his father’s murder.He seeks revenge for his father’s murder. He wants to take revenge on Claudius for/revenge himself for /avenge his father’s murder.
6) Hamlet wants his revenge murdering the killer of his father. Better: Hamlet wants to take his revenge by killing Claudius, his father’s murderer.

1) - OK

2) He has doubts about committing suicide. He is not sure what will happen after death. Most people are unsure of what will happen after death. <~~(I wouldn't say "everyone" in the last sentence, since you cannot prove that every single person on earth is unsure or scared of what happens after death.)

3) The hero usually goes through a period of doubt during which he plans his revenge.

4) Hamlet is a revenge tragedy because it includes all the features of the revenge tragedy present in Seneca. <~~(You should make clear the reference to Seneca. Are you referring to a particular work of his in which he analyzes drama?)

5) Hamlet decides to take vengeance for his father’s murder. He seeks revenge for his father’s murder. He wants to take revenge on Claudius to avenge his father’s murder.

6) Hamlet wants his revenge by murdering the killer of his father. Better: Hamlet wants to take his revenge by killing Claudius, his father’s murderer. Yes, the second sentence is better.

1) The sentence "Being a Renaissance man, Hamlet doubts the existence of an afterlife" is grammatically correct. To understand this sentence, it would help to first understand what a Renaissance man refers to. A Renaissance man is a term used to describe someone who is well-rounded and knowledgeable in various fields such as arts, sciences, philosophy, etc. In the context of Hamlet, being a Renaissance man means that he is well-educated and has a broad understanding of the world.

In this sentence, it suggests that because Hamlet is a Renaissance man, he has doubts about the existence of an afterlife. This means that he is uncertain or skeptical about the idea of life after death.

2) The sentence "He doubts suicide/ He has doubts about committing suicide/ He is doubtful about suicide. He is not sure of what will happen after death. Every man is scared of what will happen after death" can be rewritten to provide more clarity and cohesion:

"He has doubts about committing suicide and is unsure of what will happen after death. This uncertainty about the afterlife is a common fear among all individuals."

In this sentence, it conveys that Hamlet is uncertain about the act of suicide and the consequences it might have in the afterlife. It further suggests that the fear of the unknown after death is something that is universally experienced by everyone.

3) The sentence "The hero usually has a period of doubt in which he projects his revenge" can be slightly improved by rephrasing:

"The hero usually goes through a period of doubt during which he plans his revenge."

In this revised sentence, it conveys that the hero in a story (in this case, Hamlet) often experiences moments of hesitation or uncertainty, during which he strategizes and prepares for his revenge.

4) The sentence "Hamlet is a revenge tragedy because it includes all the features of the revenge tragedy present in Seneca" can be modified for clarity:

"Hamlet is a revenge tragedy because it incorporates all the typical elements of a revenge tragedy, as seen in Seneca's works."

In this revised sentence, it clarifies that Hamlet, the play itself, is categorized as a revenge tragedy due to its inclusion of all the key features commonly found in Seneca's revenge tragedies.

5) The sentence "Hamlet decides to have vengeance for his father’s murder" can be revised for better clarity:

"Hamlet decides to seek revenge for his father’s murder. He seeks to take revenge on Claudius for his father's death."

In this revised sentence, it conveys that Hamlet chooses to pursue vengeance for his father's murder and specifically seeks to inflict punishment or retribution upon Claudius, the one responsible for his father's death.

6) The sentence "Hamlet wants his revenge murdering the killer of his father" can be improved by rephrasing:

"Hamlet wants to take his revenge by killing Claudius, who is the murderer of his father."

In this revised sentence, it clarifies that Hamlet's desire for revenge involves him taking action by killing Claudius, the individual who was responsible for his father's murder.