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When referring to hypothetical future circumstance, there may be little difference in meaning between the first and second conditional (factual vs. counterfactual, realis vs. irrealis). The following two sentences have similar meaning, although the second (with the second conditional) implies less likelihood that the condition will be fulfilled:
In British English (BrE), collective nouns can take either singular (formal agreement) or plural (notional agreement) verb forms, according to whether the emphasis is on the body as a whole or on the individual members respectively; compare a committee was appointed with the committee were unable to agree.
Whether is always a subordinator. It marks closed interrogative content clauses such as I wonder whether this would work.It is often possible to substitute if for whether, the main exceptions being when the subordinate clause functions as the subject, as in Whether it's true is an empirical question and cases with or not, such as I'll be there whether you are there or not.
During the critical period between 4 and 6 years old, there is a significant increase in the accuracy of grammaticality judgments, since metalinguistic skill is in critical development; the judgment relies on the psycholinguistic ability of the child to access their internalized grammar and to compute whether it can or cannot generate the ...
English grammar is the set of structural rules of the English language. ... unless, only if, whether or not, even if ... Consider the difference between he ...
Let us notate a formal grammar as = (,,,), with a set of nonterminal symbols, a set of terminal symbols, a set of production rules, and the start symbol.. A string () directly yields, or directly derives to, a string (), denoted as , if v can be obtained from u by an application of some production rule in P, that is, if = and =, where () is a production rule, and , is the unaffected left and ...
A grammar that uses phrase structure rules is a type of phrase structure grammar. Phrase structure rules as they are commonly employed operate according to the constituency relation, and a grammar that employs phrase structure rules is therefore a constituency grammar; as such, it stands in contrast to dependency grammars, which are based on ...
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 ...