In this sentence, "can" is part of the verb, "can prepare."
When I prepare to write a speech, the idea summary will be found in the topic sentence.
My remarks are spontaneous since I did not prepare a speech in advance.
In that sentence, the word "primed" is the predicate (verb). (v) to make ready, prepare
In this sentence, the word "connoisseur" is a noun.
Caustic is a noun in that sentence.(v) to make ready, prepare(n) corrosive substance
Verb
Prepare is a verb.
I made an acceptance speech for my promotion. His acceptance of the conditions made him legally responsible under the contract.
regular speech
The best public speakers prepare for a speech by not waiting until the last minute to write the speech and they practice it over and over again until they are confident with it.
To do something apprehensively is to do it with caution and concern about the consequences. An example of it used in a sentence is: The shy boy apprehensively walked up to the podium to give his speech.
It's a verb.