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Sentence Correction: Dangling Modifiers - Overview

Using the latest technology and trendy designs, electronics companies develop one gadget after another as doing so can be extremely profitable.

This sentence begins with a modifier: Using the latest technology and trendy designs. A modifier should be placed right next to the noun it describes. The only noun that this modifier can logically modify is electronics companies. The noun  electronics companies, however, is quite far from the modifier that describes it.

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

A modifier, characterized by all of the following:
1. Verb+ing or Verb in 3rd form
2. Separated from the rest of the sentence by a comma
3. Appears at the very beginning of the sentence

Whenever you see this Stop Sign, focus on the modifier: check whether the noun right after the modifier is indeed the noun that the modifier describes. If it isn't - you've found your mistake.

This sentence begins with a modifier: Using the latest technology and trendy designs. A modifier should be placed right next to the noun it describes. The only noun that this modifier can logically modify is electronics companies. The noun  electronics companies, however, is quite far from the modifier that describes it.

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

A modifier, characterized by all of the following:
1. Verb+ing or Verb in 3rd form
2. Separated from the rest of the sentence by a comma
3. Appears at the very beginning of the sentence

Whenever you see this Stop Sign, focus on the modifier: check whether the noun right after the modifier is indeed the noun that the modifier describes. If it isn't - you've found your mistake.

This answer choice is grammatically incorrect. A pronoun (in this case, it) refers to a previously mentioned noun. If we wish to refer to a previously mentioned verb (develop), the phrase to do so or doing so should be used.

What helps us identify this question as a Pronoun question is the following Stop Sign:

Any pronoun in the underlined part or after it.

This answer choice is grammatically incorrect. A pronoun (in this case, it) refers to a previously mentioned noun. If we wish to refer to a previously mentioned verb (develop), we need to use the phrase to do so or doing so.

What helps us identify this question as a Pronoun question is the following Stop Sign:

Any pronoun in the underlined part or after it.

You're right!

This answer choice correctly uses doing so to refer to a previously mentioned verb (develop one gadget after another). It also places the noun (electronics companies) directly after the modifier that describes it (Using the latest technology and trendy designs).

Using the latest technology and trendy designs, electronics companies develop one gadget after another as doing so
Using the latest technology and trendy designs, one gadget after another is developed by electronics companies as doing so
Using the latest technology and trendy designs, electronics companies develop one gadget after another as it
Using trendy designs and the latest technology, one gadget after another is developed by electronics companies because doing so
Electronics companies, using the latest technology and trendy designs, develop one gadget after another because it