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This is an Oy-Yo verb. Stem: s-, fu-, er-, se-. There are two ways to say "To be" in Spanish: ser and estar. They both mean "to be", but they are used in different ways. As a rule of thumb, ser is used to describe permanent or almost permanent conditions and estar to describe temporary ones. [11]
The Mach angle is acute, showing that the body exceeds Mach 1. The angle of the Mach wave (~59 degrees) indicates a velocity of about Mach 1.17. In fluid dynamics, a Mach wave, also known as a weak discontinuity, [1] [2] is a pressure wave traveling with the speed of sound caused by a slight change of pressure added to a compressible flow.
In Spanish, the difference is made by the choice of ser or estar. El chico es aburrido uses ser to express a permanent trait ("The boy is boring"). El chico está aburrido uses estar to express a temporary state of mind ("The boy is bored"). The same strategy is used with many adjectives to express either an inherent trait (ser) or a transitory ...
The Spanish copulas are ser and estar.The latter developed as follows: stare → *estare → estar. The copula ser developed from two Latin verbs. Thus its inflectional paradigm is a combination: most of it derives from svm (to be) but the present subjunctive appears to come from sedeo (to sit) via the Old Spanish verb seer.
Mach reflection can exist in steady, pseudo-steady and unsteady flows. When a shock wave, which is moving with a constant velocity, propagates over a solid wedge, the flow generated by the shock impinges on the wedge thus generating a second reflected shock, which ensures that the velocity of the flow is parallel to the wedge surface.
The verbs dar (to give) and estar (to be) both exhibit irregularities in the present indicative and present subjunctive because their stems cannot be stressed (in dar the stem is just d-, in estar it was originally st-). The form dé is so written to distinguish it from the preposition de. Both verbs are also irregular in the preterite and ...
A picture shows the Ford Mustang Mach-E car at Ford's Halewood plant in Liverpool, north west England, on October 18, 2021. - US auto giant Ford on October 18 unveiled plans to convert a UK ...
The two subjunctives have their origins in Latin; from the past perfect indicative came the -ra form, and from the past perfect subjunctive came the -se form. [62] Both subjunctives are found in Spain, but the -se one is almost extinct or much rarer in Latin America, where it is seen as a characteristic of the Spanish of Spain; Latin American ...