What is the verb?
Past, Present, or Future
Is it used Correctly?
Modal Auxiliary Verbs
100

We went to the park

went

100

The lion ran to the castle

past

100

When I was younger, I will run for 10 miles without breaking a sweat!

will should be replaced with could

100

The verb that means “to express a possibility”.

could

200

We are reading a story

are

200

The kids are going to Narnia

future

200

She could not be here; it's for employees only.

could should be should

200

The verb that means “ likely to happen in the future”.

will

300

We will be going to school tomorrow

will 

300

We read The Lion, the Witch, and the Wardrobe

past

300

This door must be left shut at all times!

The verb is used correctly

300

The verb that means “to express an obligation”.

must

400

They are at school

are

400

The kids will search for their brother

future

400

I promise that I will write you every single day.

will is used correctly
400

The verb that means “to express advice”.

should