Commas
Identify and correct errors with plural and possessive nouns
Correct inappropriate shifts in a verb tense
100

Where do the commas go?

After NASA successfully landed astronauts on the moon in 1969 the agency made several more missions to the moon in the 1970s.

After NASA successfully landed astronauts on the moon in 1969, the agency made several more missions to the moon in the 1970s.

100

The cat's chased each other around the yard.

The cats chased each other around the yard.

100

When I was a child, I am afraid of the dark.

When I was a child, I was afraid of the dark.

200

After eating the pizza we realized it was actually cold.

After eating the pizza, we realized it was actually cold.

200

The Jones' are hosting a Halloween party this weekend.

The Joneses are hosting a Halloween party this weekend.

200

The teacher explained the lesson and then writes the answers on the board.

The teacher explained the lesson and then wrote the answers on the board.

300

My favorite fruits are apples which are crisp and strawberries which are sweet.

My favorite fruits are apples, which are crisp, and strawberries, which are sweet.

300

The families picnic was cancelled because of rain.

The family's picnic was cancelled because of rain.

300

Last night we go to the movies, and the theater is completely packed.

Last night we went to the movies, and the theater was completely packed.

400

In the middle of the night I heard someone knocking on the door.

In the middle of the night, I heard someone knocking on the door.

400

The childrens toys were scattered all over the floor.

The children's toys were scattered all over the floor.

400

The principal speaks for a long time, then handed out the diplomas and congragulates everyone.

The principal spoke for a long time, then handed out the diplomas and congratulated everyone.

500

The cat however refused to move even when the vacuum came near.

The cat, however, refused to move even when the vacuum came near.

500

Both teams players uniforms were stained after the game.

Both teams' players' uniforms were stained after the game.

500

When I was younger, I love to swim in the lake behind our house.

When I was younger, I loved to swim in the lake behind our house.

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