on Just Publishing Advice:

The subjunctive forms in English are easy to use

However, the subjunctive structure of the verb can cause a little bit of confusion.

Verbs in the present subjunctive take a distinct form that is similar to the imperative mood, so we need to be careful in choosing grammar structures to reflect the sense of a phrase accurately.

Unlike the subjunctive tense in languages such as French and Spanish, we use the subjunctive in English far less frequently.

It is also used a little less often in American English than in British English because of its sense of implied formality.

To get a basic understanding of the mood and how to use it, we need to look at the meaning and the grammatical forms in the present subjunctive and past subjunctive.