A regular checking account simply lets you do all the things you'd expect from a checking account.

Lifting bags of groceries. - is an example of muscular strength.

The movement of another swimming creature causes the stinging cells in the tentacles of a jellyfish to fire. -prepositional phrase

Medical research may find more uses for jellyfish in the future. - Linking verb

That night, representatives from major record labels and music television stations were in the audience at CBGB.
"Representatives" is a plural subject.

The group recently performed at CBGB, a club in New York City.
"In New York City" is a prepositional phrase.

Irregular verbs, prepositional phrases, dependent clauses, compound subjects, and indefinite pronouns are not inherently bad in writing. They are essential elements of language that add variety, clarity, and complexity when used correctly.

Irregular verbs, prepositional phrases, dependent clauses, compound subjects, and indefinite pronouns are not inherently bad in writing; they serve important functions and contribute to the richness of expression. Proper understanding and usage are necessary for effective writing.