Are there any examples of the subjunctive tense in the English language besides the verb "to be"?
There are many English verbs used in subjunctive mood. This type of sentences is used to tell about imaginary situations or wishes.
If I won in a lottery, I would buy a house.
If I were you, I would not do it.
In some situations subjunctive mood is used to express offers or kind requests.
Would you like tea or coffee?
Would you mind opening the door?
Note: Subjunctive form is not a tense, it is one of the verb moods.