Auxiliary verbs are, as the name suggests, helping verbs. T...

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                                 LARGEST AIRCRAFT IN THE WORLD

                                     

      We have lift-off. The world's largest aircraft has taken to the skies for the first time.The Airlander 10 spent nearly two hours in the air, having taken off from Cardington Airfield in Bedfordshire. During its flight, it reached 3,000 feet (914 meters) and performed a series of gentle turns all over a safe area.

      The aircraft is massive – as long as a football pitch and as tall as six double decker buses and capable of flying for up to five days. It was first developed for the US government as a long-rangesurveillance aircraft but was scrapped following cutbacks.

      Each one cost 25 million pounds and can carry heavier loads than jumbo jets while also producing less noise and emitting less pollution. The makers, Hybrid Air Vehicles, believe it‟s the future of aircraft, and that one day we'll be using them to get places.

      But we're a while away yet. The Airlander will need to clock up 200 hours‟ flying time before beingdeemed airworthy by aviation bodies. If it passes though, we can hope we'll all get some extra leg room.

Auxiliary verbs are, as the name suggests, helping verbs. They do not make up a verb phrase on their own, but usually be accompanied by a following main verb. Auxiliary verbs are a small class of words, made up of primary auxiliaries like "can‟. They are structurally necessary for certain constructions especially negative and interrogative sentences and because of them it enables us to distinguish auxiliaries from the main verbs. According to these grammar point choose the correct alternative:
Alternativas