Sentence Boundaries
Noun Modifier Mistake?
Comma, Colon, Semi-colon
Subject-Verb Agreement
Verb tense
100

The Saint Lawrence River ______ part of the boundary between New York and Canada. 

Forming, being, forms, having formed 

What is forms? 

100

Running through the park, the trees looked beautiful.

What is the trees.

100

I'm sorry I love you. 

What is Semicolon?

100

One of those disasters that often occurs/occur only in movies happened just as I got off the plane.

What is occur? 

100

The amount of time people (spend/spent/have spent/will spend) listening to the radio has decreased since five years ago.

spend

200

A park in Manhattan _____ after James Madison, who was the fourth American president. 

named, naming, who was named, is named

is named

200

Flying overhead, I saw a flock of birds.

What is I?

200

Having examined all the data gathered for my study I was ready to write the final chapter of my dissertation.

What is Comma? 

200

A proportion of authors are/is at the conference.

What is are? 

200

The morning bell (rang/rings/had rung/has rung) at 7:55 every weekday since the new schedule was implemented. 

has rung

300

Electric cars, already available in the United States, ______ to cleaner air in cities.

which contribute, having contributed, and contribute, contribute

contribute

300

Burned during the fire, the firefighters investigated the house. 

What is firefighters?

300

We have come up with five travel choices for this summer Mexico City, Dublin, Amsterdam, Hawaii, and Indianapolis.

What is Colon? 
300

Not only the previously published papers but also the one under review were/was called into question.

What is was? 

300

Some people do not adapt as well to stressful situations as others (did/do/will/have done)

do

400

The talk show host apologized for her on-air ______ many viewers believed the apology was insincere. 

gaffe, however,   gaffe; however,  gaffe; but  gaffe; despite the fact that

gaffe; however 

400
Waiting by the bus stop, we were hit by the heavy winds. 

What is no change?

400

The CEO gave this statement “I’m sorry it had to come to this. I really believe I did my best.”

What is Colon? 

400

The first author as well as the last two authors has/have approved the proofs.

What is has? 

400

Since its founding over 30 years ago, the company (prided/had prided/has prided/prides) itself on its forward-thinking mission and quality service. 

has prided

500

The spring came early this ____ reservoirs behind dams filled too early and vegetation dried out. 

year, this means  year, meaning  year, means  

year; meaning

year, meaning


500

With arms waving, the balloon flew away from the girl. 

What is the balloon?

500

The weeds in my yard are very green unfortunately, the grass is brown and dying.

What is Semicolon? 

500

Boston, and all New England cities, tend/tends to get snow in January.

What is tends? 

500

Sharonda (had believed/believed/will believe/has believed) her friend was a generally trustworthy person until she caught him in an obvious lie riddled with nonsensical contradictions.

believed 

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