How to change simple past tense into simple present tense?

For converting a sentence in Simple Past Tense into Simple Present Tense, we need to convert the main verb from the past tense form (V2) to the base form (V1). The following steps are followed in such conversion process. 

1. Regular Verbs- Remove the -ed ending. (Example: walked ➔ walk)
2. Irregular Verbs-