Combining two sentences needs a legal join: a comma plus FANBOYS, a semicolon, or a dependent opener. Two complete sentences glued with a comma fail. Passage-level moves are in macro logic.
Keep both ideas, fix the hinge
Do not drop a necessary clause to make the join look clean. A comma splice is the usual miss, in comma splices. Where a phrase sits inside the new sentence is in phrase placement.
Splitting one sentence apart is the reverse skill, in splitting a sentence.
The bottom line
Join with a legal hinge. Do not comma-splice, and do not delete the point.
Start practicing
Start with a free diagnostic, then drill your weak spots with 15-question quizzes and track how you're doing across Reading, English, and Math. Compare plans whenever you're ready to go further.
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