Past tense verbs
Pronunciation /s/ /z/ /Iz/
In, on, at
Pronunciation /d/ /t/ /Id/
Contractions
100

Start

Started

100

Talks

/s/

100

I live ________ Main St.

on

100

Picked

/t/

100

I'm

I am

200

Make

Made

200

Fixes

/Iz/

200

I was born ______ 1996.

in

200

Cleaned

/d/

200

He's

He is

300

Send

Sent

300

Sleeps

/s/

300

We have class _____ Mondays and Wednesdays.

on

300

Wanted

/Id/

300

Shouldn't 

Should not

400

Go

Went

400

Goes

/z/

400

I love to swim ______ the summer.

in

400

Visited

/Id/

400

Weren't

Were not

500

Buy

Bought

500
Prefers

/z/

500

I go to sleep ______ midnight.

at

500
Helped

/t/

500

We'd

We would