apostrophe rules
semicolons
colons/commas
verb tense and agreement
miscellaneous
100

The cat was old, _ (its, it's)_ back legs could barely hold her.

its

100

Call me tomorrow I will give you my answer then.

Call me tomorrow; I will give you my answer then.

100

He plays football soccer and baseball. (comma)

 He plays football, soccer, and baseball.

100

John plays piano in church yesterday.

Fix the verb tense.

played

100

_(To, Too, Two)__ many kids are heading over to John's house.

Too

200

My (father, fathers, father's, fathers') phone rang very loud.

father's

200

You will want to bring many camping items for example, sleeping bags, pans, and warm clothing will make the trip better.

You will want to bring many camping items; for example, sleeping bags, pans, and warm clothing will make the trip better.

200

I want an assistant who can do the following (a) input data, (b) write reports, and (c) complete tax forms.

I want an assistant who can do the following: (a) input data, (b) write reports, and (c) complete tax forms.

200

Mike (plays, play) all day long.

plays

200

I'm so excited because (it's, its) beginning to look a lot like Christmas!

it's

300

(There, Their or They're) all out of popcorn at the fair.

They're

300

When I finish here, I will be glad to help you and that is a promise I will keep.

When I finish here, I will be glad to help you; and that is a promise I will keep.

300

We went to the concert but we left early. (comma)

We went to the concert, but we left early. (Put a comma before but when the word connects two independent clauses)

300

My friends plays the guitar.  (correct or does verb need fixed?)

play (plural noun, no s on the verb) or friend

300

The car spun once or twice and (then, than) stopped.

then

400

Many student's majoring (no change, students majoring, students major, student's majors) in philosophy have no intention of becoming philosophers. 

students majoring (students don't own anything and are being described)

400

They couldn't make it to the summit and back before dark therefore, they decided to camp for the night.

They couldn't make it to the summit and back before dark; therefore, they decided to camp for the night.

400

There are basically two ways to write with a pen or pencil, which is inexpensive and easily accessible.

There are basically two ways to write: with a pen or pencil, which is inexpensive and easily accessible.

400

One dog are sitting on the sidewalk.

is (singular noun = is)

400

My $20 million house is to be split among my dad, sister, brother and daughter.

(correct or issue with commas?)

My $20 million house is to be split among my dad, sister, brother, and daughter.

500

I have eaten mangoes from my (parent, parents, parents', parents's) home garden 10 times.

parents' (plural possessive form - plural noun ends in "s" so just add an apostrophe)

500

I knew these streets however they've changed.

(add a semicolon and comma!)

I knew these streets; however, they've changed.

500

I'm nervous I wipe my hands and check my phone

I'm nervous: I wipe my hands and check my phone

500

The cat chase the mouse. (correct or verb change?)

chases (verb) or cats (if subject is plural)

500

Time flies when we are having fun we are always having fun. (semicolon or colon).

Time flies when we are having fun; we are always having fun.