"To try to write certain sentences is difficult"
The correct statements are 1, 2 and 3.
1) The sentence is correctly written. The pattern "to try to do something" is correct and can be used.
2) The sentence contains more than one infinitive. It contains two infinitive verbs. TO TRY and TO WRITE.
3) One infinitive is inside another infinitive phrase. "To try to write certain sentences" is an infinitive phrase, it functions as a noun because it is the subject of the sentences. So, the second TO INFINITIVE is inside the main infinitive phrase. (That is the reason why number 4 is not correct)
I have been trying to google about the topic you are searching for. Are you sure that the stage you need to write about is called transitional? Probably you have meant revising stage. <span>No text should be sent out or published without going over it at least once! Twice is even better. You must reread even the shortest business email to prevent any embarrassing mistakes (such as sending the wrong email to the wrong person, to start with). Revising means evaluating your text’s content and making sure you actually wrote what you intended in the planning stage. </span>
<span>q2
The details provided about this experience are vague and ineffective.
</span><span>The word choice is equally vague and limited.
</span><span>Overall, this essay represents a limited writing performance.
q3
</span><span>The word choice is more general than specific, and sentence fragments create minor disruptions in the fluency of the writing.
Sentences are varied, purposeful, and well controlled, enhancing the effectiveness of the essay.
All ideas are strongly related to the thesis and are focused on the topic specified in the prompt.
The presentation of the two scenarios is too brief to be considered more than superficial.
</span>
11. abysmal
12. ashen, anemic
13. anhydrous
14. animosity
15. atypical
Hope this helps.