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  2. English conditional sentences - Wikipedia

    en.wikipedia.org/wiki/English_conditional_sentences

    "First conditional" or "conditional I" refers to a pattern used in predictive conditional sentences, i.e. those that concern consequences of a probable future event (see Types of conditional sentence). In the basic first conditional pattern, the condition is expressed using the present tense (having future meaning in this context).

  3. Conditional sentence - Wikipedia

    en.wikipedia.org/wiki/Conditional_sentence

    A conditional sentence is a sentence in a natural language that expresses that one thing is contingent on another, e.g., "If it rains, the picnic will be cancelled." They are so called because the impact of the sentence’s main clause is conditional on a subordinate clause.

  4. Uses of English verb forms - Wikipedia

    en.wikipedia.org/wiki/Uses_of_English_verb_forms

    The conditional perfect progressive or conditional perfect continuous construction combines conditional mood with perfect progressive aspect. It consists of would (or sometimes should in the first person, as above) with the bare infinitive have, the past participle been and the present participle of the main verb. It generally refers to a ...

  5. If and only if - Wikipedia

    en.wikipedia.org/wiki/If_and_only_if

    The corresponding logical symbols are "", "", [6] and , [10] and sometimes "iff".These are usually treated as equivalent. However, some texts of mathematical logic (particularly those on first-order logic, rather than propositional logic) make a distinction between these, in which the first, ↔, is used as a symbol in logic formulas, while ⇔ is used in reasoning about those logic formulas ...

  6. Necessity and sufficiency - Wikipedia

    en.wikipedia.org/wiki/Necessity_and_sufficiency

    One can also say S is a sufficient condition for N (refer again to the third column of the truth table immediately below). If the conditional statement is true, then if S is true, N must be true; whereas if the conditional statement is true and N is true, then S may be true or be false. In common terms, "the truth of S guarantees the truth of N ...

  7. Bird flu vaccine gets ‘conditional license’ from USDA ...

    www.aol.com/bird-flu-vaccine-gets-conditional...

    A New Jersey pharmaceutical company has received a “a conditional license" for its bird flu vaccine for use in chickens. ... The company first worked on developing bird flu vaccines in 2001 and ...

  8. Grammatical mood - Wikipedia

    en.wikipedia.org/wiki/Grammatical_mood

    In linguistics, grammatical mood is a grammatical feature of verbs, used for signaling modality. [1] [2]: 181 [3] That is, it is the use of verbal inflections that allow speakers to express their attitude toward what they are saying (for example, a statement of fact, of desire, of command, etc.).

  9. OK, What Does 'S/U' Mean on Social Media, Exactly? - AOL

    www.aol.com/ok-does-u-mean-social-100600986.html

    Incidentally, Instagram and TikTok also use S/U, which can mean "swipe up" or "scroll up." As with other social media platforms, the acronym is an easy way to let others know there is more content ...