Base TO Past Simple
Base TO Past Participle
Past Simple TO Base
Past Participle TO Base
Past Simple OR Present Perfect
100

"TO BE"

WAS / WERE
100

"TO BREAK"

BROKEN

100

HEARD

TO HEAR

100

READ

TO READ

100

I ____ (SWIM) WITH THE DOLPHINS ON MY TRIP TO BALI LAST YEAR.

I SWAM WITH THE DOLPHINS ON MY TRIP TO BALI LAST YEAR.

200

"TO DRIVE"

DROVE

200

"TO HIDE"

HIDDEN

200

BOUGHT

TO BUY

200

TOLD

TO TELL

200

WE ____ (NOT START) ON OUR PROJECT YET

WE HAVEN'T STARTED ON OUR PROJECT YET.

300

"TO LEAVE"

LEFT

300

"TO LOSE"

LOST

300

GREW

TO GROW

300

HAD

TO HAVE
300

DINOSAURS ____ (BECOME) EXTINCT A LONG TIME AGO.

DINOSAURS BECAME EXTINCT A LONG TIME AGO.

400

"TO HOLD"

HELD

400

"TO THROW"

THROWN

400

LED

TO LEAD

400
FROZEN

TO FREEZE

400

WE _____ (NEVER - GO CAMPING) IN THE FOREST BEFORE.

WE HAVE NEVER GONE CAMPING IN THE FOREST BEFORE.

500

"TO KNOW"

KNEW

500

"TO SING"

SUNG

500

SPENT

TO SPEND

500
FLOWN

TO FLY

500

HOW MANY COUNTRIES ____ (YOU - VISIT) SO FAR?

HOW MANY COUNTRIES HAVE YOU VISITED SO FAR?