In drama, a protasis is the introductory part of a play, usually its first act.

It is also used in the protasis of contrary-to-fact sentences.

For the concept of protasis in linguistics, see Conditional sentence.

It is the final part of a play, following the protasis, epitasis, and catastasis.

In a conditional, the protasis is a subordinate clause.

Vance began his questioning without prelude or protasis.

To grammarians, the question was: Does the conditional protasis fit the suppository apodosis?

He defined a play as being made up of five separate parts: prelude, protasis, epitasis, catastasis and catastrophe.

In terms of logic, the protasis corresponds to the antecedent, and the apodosis to the consequent.

Donatus invented the system whereby a play is made up of three separate parts: protasis, epitasis, and catastasis.

The forms of verbs used in the protasis and apodosis are often subject to particular rules as regards their tense and mood.

In English conditional sentences, the condition clause (protasis) is a dependent clause, most commonly introduced by the conjunction if.

In common with other works of omens, each clause is formed from a protasis giving the antecedent and an apodosis giving the consequence.

Syntactically speaking, the apodosis, or consequence, is not linked to the protasis, or condition, and this causes semantic confusion.

The main verb in the protasis (dependent clause) is either in the subjunctive or in the indicative mood.

Aristotle uses the word premise (protasis) as a sentence affirming or denying one thing of another (Posterior Analytics 1.

The first line of gurindam is known as syarat (protasis) and the second line is jawab (apodosis).

What Carroll calls the protasis of a conditional is now known as the antecedent, and similarly the apodosis is now called the consequent.

It doubles itself in the middle of his life, reflects itself in another, repeats itself, protasis, epitasis, catastasis, catastrophe.

In syntax, an aposiopesis arises when the "if" clause (protasis) of a condition is stated without an ensuing "then" clause, or apodosis.

(The protasis may either precede or follow the apodosis; it is equally possible to say "The picnic will be cancelled if it rains".)

He attempts to clarify the issue by arguing that the protasis and apodosis of the implication "If Carr is in ..." are "incorrectly divided."

By means of ise or -(y)se, a verb can be made conditional in the sense of being the hypothesis or protasis of a complex statement:

The protasis will often use a different verb form, depending on the grammatical rules of the language in question, such as a past tense form or the subjunctive mood.

A conditional sentence usually contains two clauses: an if-clause or similar expressing the condition (the protasis), and a main clause expressing the conditional circumstance (the apodosis).