The verb which is spelled the same but pronounced differently depending on the tense is read.
If you change this verb through tenses, it will be: read (pronounced as /ri:d/) - read (pronounced as /rɛd/) - read (pronounced as /rɛd/). As you can see, the spelling is the same, but the pronunciation is different.
Be: be - was/were - been. - the forms are different
Throw: throw - threw - thrown. - the forms are different
Speak: speak - spoke - spoken. - the forms are different
