This sentence's error lies in the incorrect way in which it uses a semicolon to introduce a list. "Knit stitches and purl stitches" are the "two stitches" that the sentence introduces earlier, so a colon is the most appropriate punctuation mark to use in this instance. The corrected sentence reads, "Knitting may appear complex, but even its most complicated patterns can be created from a combination of just two stitches: knit stitches and purl stitches."

A comma should be used instead of a semicolon to separate the introductory phrase "without their best player" from the rest of the second independent clause "the team didn't have a chance of winning."

A semicolon is meant to connect two thoughts that are both independent clauses. However, the second clause here is dependent and is connected by the word "so." In this situation, a comma would be appropriate to link that subordinate clause to the first independent clause. So, the corrected sentence would read, "That book over there belongs to Eileen, so we should help return it to her before she needs to study for the massive English test next week."

A semicolon is used to connect two independent clauses. In this case, the phrase that follows the semicolon is not an independent clause (a complete sentence that can stand on its own), so the use of a semicolon here is incorrect. Changing the semicolon to a comma would correct the sentence's error.

A colon, not a semicolon, should be used to introduce a list of things. Semicolons are only used to connect two independent clauses, or parts of a combined sentence that could each stand alone as an independent sentence. That isn't the case in this sentence; "broccoli, frozen yogurt, bread, pork chops, and eggs" is not a complete sentence.

The sentence has two independent clauses. Each could be its own sentence: "I was going to go for a run today" and "the stormy weather caused me to postpone my workout." They are joined by a conjunctive adverb, "however." (Other conjunctive adverbs include "accordingly," "consequently," "hence," "moreover," "otherwise," "therefore," and "thus.") When two independent clauses are joined by a conjunctive adverb, they require a semicolon after the first clause, not a comma. The corrected sentence would read, "I was going to go for a run today; however, the stormy weather caused me to postpone my workout."

The semicolon used after "techniques" is an inappropriate way to introduce a list. To correct this error, we should replace the semicolon with a colon. 

The semicolon after "Saturday;" is the error in the sentence, and should be replaced with a comma to correctly separate the clauses. 

The semicolon after "person" is incorrectly used in this sentence, and should be replaced with a comma. 

Here, we’re separating an independent clause (“The guests will have several desserts to choose from”) from a list (“chocolate cake, lemon sorbet, peach pie, and flan”), so the correct punctuation is a colon and not a semicolon. Semicolons are only used to separate two independent clauses, not an independent clause and a list.