Category 1
Category 2
Category 3
Category 4
Category 5
100

I have went through this situation before.

– went–gone

100

She suggested goes home earlier.

– goes–going

100

You must finish it now — it’s not urgent.

– must–should

100

He is aware about the issue.

– about–of

100

This solution is very economic for small firms.

– economic–economical

200

By the time we arrived, they leaved the office.

– leaved–left

200

He admitted takes the money.

– takes–taking

200

It was raining; although, we continued working.

– although–however

200

They were satisfied by the results.

 – by–with

200

He is too sensible to criticism.

– sensible–sensitive

300

She has been working here since five years.

– since–for

300

They avoided answers the question.

– answers–answering

300

He didn’t study; therefore, he passed the exam.

– therefore–so

300

She insisted stays longer.

– stays–staying

300

These kind of problems require careful analysis.

– These–This

400

He was knowing the answer but stayed silent.

– was knowing–knew

400

You might be exhausted after that trip.

– might–must

400

I was tired; however, I went to bed early.

– however–so

400

The new policy will effect many employees.

– effect–affect

400

Everyone should solve it by theirselves.

– theirselves–themselves

500

I will call you when I arrives.

– arrives–arrive

500

He can be at home; all the lights are off.

– can–might

500

She is responsible of managing the team.

– of–for

500

Prices have raised significantly this year.

– raised–risen

500

This results clearly show improvement.

– This–These