The subjunctive is not a tense, rather it’s a
Mood
Subjunctive reflects
How the speaker feels about the action
Use subjunctive mood when an action is
Uncertain (not factual)
Forming the present subjunctive
Go to yo
Drop the o
Add the opposite ending and adjust for subject
Car verbs
C-qu
Gar verbs
G-gu
Zar
Z-c