In Numbers^x, Present perfect^x, Auxiliaries^x

For my home grammar assignment I am to "describe the form of the verb phrases in the following sentences (:finiteness, tense, modality, aspect, voice): 1. The house had been painted a bright red before it was sold. 2. Pigeons will be nesting on the statue's head. 3. It is good to have seen...

Hello Sextus Here you go: 1) “The past few years have witnessed the publication of a considerable number of books and papers on the influence that ancient scepticism (broadly defined) . I don’t understand whether by adding “an” before “assimilation”, the sentence is correct, or whether I...