Subjunctive mood
* The subjunctive mood is used to express counterfactual (or conditional) statements, and is often found in if-then statements, and certain formulaic expressions. It is typically marked in the present tense by the auxiliary "were" plus the present participle (<-ing>) of the verb.
1. Were I eating, I would sit.
2. If they were eating, they would sit.
3. Truth be told...
4. If I were you... I would do that.

The conjugation of these moods becomes a significantly more complex matter when they are used with different tenses. However, casual spoken English rarely uses the subjunctive, and generally restricts the conditional mood to the simple present and simple past. A notable exception to this is the use of the present subjunctive in clauses of wish or command which is marked in one or two ways: (1) if third person singular, the "-s" conjugation called for by the declarative mood is absent, and (2) past tense is not used. For example, "They insisted that he go to chapel every morning" means that they were requiring or demanding him to go to chapel. However, "They insisted that he went to chapel every morning" means they are reasserting the statement that, in the past, he did attend chapel every morning. The underlying grammar of this distinction has been called the "American subjunctive". On the other hand, other constructions for expressing wishes and commands, which do not use the subjunctive, are equally common, such as "They required him to go..."