Seudónimo Seudónimo
  • 03-05-2016
  • English
contestada

When using the perfect tenses of verbs, it's necessary to add a/an

A. irregular verb.
B. helping verb.
C. suffix.
D. infinitive.

Respuesta :

ali2713
ali2713 ali2713
  • 03-05-2016
Its is necessary to add a helping verb
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