What is the passive verb in the following sentence?: He is wearing a shirt that was just washed.
The passive form is was washed
The passive forms of verbs can be recognized by the structure to be + Past Participle. The verb to be can be in any tense so valid passive forms are:
is done (Present Simple)
has been done (Present Perfect)
was being done (Past Continuous)
The verb to be and the Past Participle can be separated by time words like just, already, never etc. as in the given example (was just washed)