Time Markers
Simple Past
Grammar Police (Find the Mistake)
Present Perfect
Master Sentence (Transformation)
100

I haven't finished my homework ____.

I haven't finished my homework Yet

100

Yesterday, the teacher ____ (clarify) the main ideas.

Yesterday, the teacher clarified the main ideas

100

I haven't ate breakfast yet.

"I haven't eaten breakfast yet.

100

She has ____ (motivate) all her students."

She has motivated all her students."

100

Change to Simple Past using yesterday: "She has validated the results."

She validated the results yesterday."

200

She has lived in Tuxtla ____ 2020."

Minus 200 points 

200

The deer ____ (leap) over the fence two minutes ago.

The deer leapt over the fence two minutes ago.

200

Did she ever been to Mexico City?

Has she ever been to Mexico City?

200

Technology has ____ (transform) our world.

Technology has transformed our world.

200

Change to Present Perfect using already: "They overcame many obstacles."  

They have already overcome many obstacles.

300

We have studied English ____ four years

We have studied English for four years

300

She ____ (knelt) down to pray last night.

She knelt down to pray last night.

300

She has lived here since 5 years.

She has lived here for 5 years.

300

Have you ever ____ (deal) with a complicated situation?

Have you ever dealt with a complicated situation?

300

Change to Simple Past using last week: "He has clarified the instructions."

Minus 300 points

400

Be quiet! The baby has ____ fallen asleep."

Be quiet! The baby has just fallen asleep."

400

"Last year, they ____ (overcome) many difficult problems.

"Last year, they overcame many difficult problems.

400

We didn't went to school yesterday.

Minus 400 points

400

The cat has ____ (creep) silently into the room.

The cat has crept silently into the room.

400

Change to Present Perfect: "The school implemented new reforms in 2020."

The school has implemented new reforms since 2020.

500

I don't want to watch that movie. I have ____ seen it twice!"

I don't want to watch that movie. I have already seen it twice!"

500

The knight ____ (slay) the dragon in the story.

The knight slew the dragon in the story.

500

I haven't already transformed my habits.

I haven't transformed my habits yet.

500

Scientists haven't ____ (validate) the new results yet.

Scientists haven't validated the new results yet.

500

Change to Present Perfect using never: "The deer leapt over the fence."  

The deer has never leapt over the fence.

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