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Sentence Correction: Comparatives - As vs. Like

Guitars that have wooden acoustic bodies amplify the sounds created by the strings through resonance, as other stringed instruments.

This answer choice is grammatically incorrect. A comparative section beginning with as should always include a conjugated verb. The comparative section in this answer choice (as other stringed instruments), however, does not include a verb.

What helps us identify this question as a Comparative question as well as the mistake is the following Stop Sign:

Like, unlike, than, as

This answer choice is grammatically incorrect and repeats the original Comparative error. A comparative section beginning with as should always include a conjugated verb. The comparative section in this answer choice (as other stringed instruments), however, does not include a verb.

What helps us identify this question as a Comparative question as well as the mistake is the following Stop Sign:

Like, unlike, than, as

Although this answer choice corrects the original Comparative error by adding a verb (do) to the as section, it is illogical. The relative clause that have wooden acoustic bodies is clearly intended to modify the noun Guitars. However, it follows the noun sounds.

What helps us identify this question as a Relative Clause question as well as identify the mistake is the following Stop Sign:

who, which, that, whose, whom

Nice job!

This answer choice corrects the original Comparative error by adding a verb (do) to the As section.

This answer choice is grammatically incorrect and, like the original sentence, creates a Comparative error. The like section should not include a conjugated verb. In this answer choice, however, the like section includes a conjugated verb (like other stringed instruments do).

What helps us identify this question as a Comparative question as well as identify the mistake is the following Stop Sign:

Like, unlike, than, as

Guitars that have wooden acoustic bodies amplify the sounds created by the strings through resonance, as other stringed instruments
Guitars amplify the sounds that have wooden acoustic bodies, created by the strings through resonance, as other stringed instruments do
Guitars that have wooden acoustic bodies amplify the sounds created by the strings through resonance, like other stringed instruments do
As other stringed instruments, guitars that have wooden acoustic bodies amplify the sounds created by the strings through resonance
As other stringed instruments do, guitars that have wooden acoustic bodies amplify the sounds created by the strings through resonance