Subject-Verb Agreement
Pronoun-Antecedent Agreement
Verb Tense
Run-On/Comma Splices
Faulty Parallelism
100

The heaviest president was William Howard Taft, who at one time weighed over 350 pounds.

What is "was"?

100

As I walked through the marsh, a large Canada goose hissed at me menacingly, so I turned south to avoid them.

What is "it"?

100

With e-books replacing print books at an increasingly rapid pace, I wonder whether books disappeared in the same way that ancient scrolls did.

What is "will disappear"?

100

About one million Americans are vegans. Who eat no animal products at all, not even milk, cheese, or honey.

What is "vegans, who"?

100

With their teeth brushed, their pajamas on, and leaving the crying puppy with a hot water bottle and an old t-shirt with the scent of its mother, the children headed up to bed.

What is "the crying puppy left"?

200

One of the judge’s most important character traits are his courage in the face of the unpopularity of his positions.

What is "is his courage"?

200

The camp is so primitive that warm water for a shower is available only once a week, so I look forward to them with great anticipation.

What is "it"?

200

Today many people, even some residents of cities, are keeping chickens in order to have a supply of fresh eggs.

What is "are keeping"?

200

Fourth-generation cell phone networks are supposed to adopt smart antennas, most carriers haven’t started installing these yet.

What is "antennas, but most"?

200

The old love letters that were discovered after the elderly couple had passed away said something about the couple’s hopes and dreams, little about their fears, and a lot about their commitment to one another.

What is "their commitment"?
300

On the wall of our family room hangs the pictures of everyone who has lived in the house since it was built, whether family or not.

What is "hang"?

300

The research team uses special tools to “core” trees without harming them and uses the cross-section produced to count the rings and determine its age.

What is "their ages"?

300

In contrast to mythical periods such as the Gold and Silver Ages, the Bronze Age regarding as a historical fact.

What is "is regarded"?

300

Approximately 1.5 million Laysan albatrosses nest on Midway Atoll every year they are such poor fliers at close quarters that during mating season low-flying birds frequently collide with bicyclists.

What is "year; they"?

300

To abandon their homes, leave behind their families, and traveling across the ocean required great courage on the part of the immigrants who moved to America.

What is "travel across the ocean"?

400

Heart attack, cancer, and stroke, in that order, is the leading cause of death in the United States, with chronic lung disease and accidents in the fourth and fifth positions.

What is "are the leading causes"?

400

The area is populated by thrush, owls, robins, goldfinches, and tanagers, and I have seen it all on my daily walks.

What is "them all"?

400

Since the organization’s founding, tens of thousands of Peace Corps volunteers will help many people with their work in villages, towns, and cities around the globe.

What is "have helped"?

400

A whole-wheat pizza crust isn’t as crispy as a crust made from regular flour, but it will have a deeper flavor.

What is "flour, but it will have"?

400

The review praised the wit, charm, and interpreting of the recitalist but never once mentioned her voice.

What is "interpretation of the recitalist"?

500

According to legend, somewhere on the island are buried the remains of the notorious pirate along with a chestful of gold and jewels.

What is "are buried"?

500

The dry ditch that crosses the property is called a “Class A Trout Stream” by the Department of Conservation, but they have running water only two months of the year, during the spring snow melt.

What is "it has"?

500

At the current rate of consumption, we have exhausted our supply of firewood before the weather turns warm.

What is "will have exhausted"?

500

It is important to remember that human intelligence comes in many different forms a musical genius might be a mediocre math student while a genius at calculus might have no musical talent at all.

What is "forms; a musical"?

500

To acknowledge that one has something to learn is taking the first step on the road to true wisdom.

What is "to take the first step"?