Answer:
The thought that is implied by the poem's first four lines is: the speaker wishes to live a carefree life.
Explanation:
Let's first take a look at the lines we are analyzing here:
<em>To fling my arms wide</em>
<em>In some place of the sun</em>
<em>To whirl and to dance</em>
<em>Till the white day is done.</em>
There is no way to know if the speaker is male or female, young or old. It could be Hughes himself, but it could also be a child. The description is quite childlike: "to fling my arms wide" is something children are more likely to do. But, imagine an adult, oppressed, hardened by prejudice and struggle, who finally achieves his dreams. To finally be free of worried, of fear, and of injustice. Wouldn't that adult feel like a child again? Carefree and happy?
That is what the four lines above seem to emphasize. The speaker wants a carefree life. He or she wants to play, to dance, to laugh his days away.
Sentences can be formed by phrases or clauses, in this case the italicized words are a phrase. A phrase is a grammatical unit composed by a set of words without subject and predicate whereas a clause is a grammatical unit formed by a set of words that includes a subject and a predicate.
The noun phrase “Wishing to be heard” is modifying the noun “speaker” since it is providing an explanation of why the subject is performing an action.