Interpreting ideas

(Compound Sentence)

A compound sentence contains two independent clauses joined by a coordinator. The coordinators are as follows: for, and, nor, but, or, yet, so. Except for very short sentences, coordinators are always preceded by a comma. In the following compound sentences, subjects are in yellow, verbs are in green, and the coordinators and the commas that precede them are in red.

I tried to speak Spanish, and my friend tried to speak English. Alejandro played football, so Maria went shopping. Alejandro played football, for Maria went shopping.

The above three sentences are compound sentences. Each sentence contains two independent clauses, and they are joined by a coordinator with a comma preceding it.

Note : how the conscious use of coordinators can change the meaning of the sentences. Sentences 2 and 3,

for example : are identical except for the coordinators.

 In sentence 2, obviously, "Alejandro played football" first, and as a consequence, "Maria went shopping."

In sentence 3, "Maria went shopping" first. In sentence 3, "Alejandro played football" because, possibly, he didn't have anything else to do, for or because "Maria went shopping." Use of other coordinators change the relationship between the two clauses because the  implications would the use of "yet" or "but" have on the meaning of the sentence?