* To be innocent (This is the most straightforward option.)
* To be guiltless
* To be blameless
* To be naive (This implies a lack of experience or knowledge.)
* To be unsullied (This suggests a lack of corruption or taint.)
* To be pure
You can also use verbs that describe actions that are associated with innocence, such as:
* To trust
* To believe
* To forgive
* To love
The best verb to use will depend on the specific context of your sentence.