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The English modal auxiliary verbs are a subset of the English auxiliary verbs used mostly to express modality, properties such as possibility and obligation. [a] They can most easily be distinguished from other verbs by their defectiveness (they do not have participles or plain forms [b]) and by their lack of the ending ‑(e)s for the third-person singular.
Formally, every sentence above looks like the first conditional, with the condition having future meaning, [5] which was not our intention. Generally, context and auxiliary words like "already", "at present", etc. sometimes are enough to inform us that the condition has present meaning, but sometimes are not, which leads to ambiguity, for example:
A conditional sentence expressing an implication (also called a factual conditional sentence) essentially states that if one fact holds, then so does another. (If the sentence is not a declarative sentence, then the consequence may be expressed as an order or a question rather than a statement.)
Modal verbs in Italian are the only group of verbs allowed to follow this particular behavior. When they do not accompany other verbs, they all use avere ("to have") as a helping verb for forming the perfect. For example, the helping verb for the perfect of potere ("can") is avere ("have"), as in ho potuto (lit.
There is no convincing evidence that Churchill said this, and good reason to believe that he did not.) [19] [20] The sentence "does not demonstrate the absurdity of using [prepositional phrase] fronting instead of stranding; it merely illustrates the ungrammaticality resulting from fronting something that is not a constituent". [21] [22]
An incomplete sentence, or sentence fragment, is a set of words that does not form a complete sentence, either because it does not express a complete thought or because it lacks some grammatical element, such as a subject or a verb. [6] [7] A dependent clause without an independent clause is an example of an incomplete sentence.
The constituency tree on the left could be generated by phrase structure rules. The sentence S is broken down into smaller and smaller constituent parts. The dependency tree on the right could not, in contrast, be generated by phrase structure rules (at least not as they are commonly interpreted).
nǐ you 去 qù go 不 bù not 去 ？ qù go 你 去 不 去 ？ nǐ qù bù qù you go not go Are you going? AB-not-AB form Example (4) illustrates the AB-not-AB pattern, where AB is the constituent consisting of the verb rende, 'know', as A, and the complement zhe ge ren, 'this CL man', as B, combining to form the AB constituent rende zhe ge ren 'know this CL man'. This produces rende zhe ...