Depending on the sentence content, there are four ways to puncuate a compound sentence with two independent clauses -
Use a semicolon
Use a semicolon and a transition word (however, therefore)
Use a colon
Use a comma and coordinating conjunction (and, but, for)
The infinitive can appear by itself, or it can be part of a larger infinitive phrase.
Examples of infinitives:
To run
To walk
To cook
To understand
To make
The best statement that explains the development of Madame Defarge is Madame Defarge takes action and leads a group of women revolutionaries.
Decide if pairs of words have parellel structure.