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(gerund phrase as the complement of a preposition) Using gerunds of the appropriate auxiliary verbs, one can form gerund clauses that express perfect aspect and passive voice: Being deceived can make someone feel angry. (passive) Having read the book once before makes me more prepared. (perfect) He is ashamed of having been gambling all night.
Resultative perfect (referring to a state in the present which is the result or endpoint of an event in the past): "I have lost my pen-knife" (message: I still don't have it) Continuative perfect (past situations continuing into present): "I have always guided him" Anterior perfect (completed past situations, but with relevance to the present):
For all uses of specific perfect constructions, see the sections below on the present perfect, past perfect, future perfect, and conditional perfect. By using non-finite forms of the auxiliary have , perfect aspect can also be marked on infinitives (as in should have left and expect to have finished working ), and on participles and gerunds (as ...
infinitive and gerund phrases, in ... perfect forms (have/has/had written, and the perfect continuous have/has/had been writing ... Meaning and the English ...
There is a perfect infinitive (to) have written and a perfect progressive infinitive (to) have been writing, and corresponding present participle/gerund forms having written and having been writing. A perfect subjunctive (have written) is also sometimes used. Future and conditional perfect forms are given below.
The first English grammar, Bref Grammar for English by William Bullokar, published in 1586, does not use the term "auxiliary" but says: All other verbs are called verbs-neuters-un-perfect because they require the infinitive mood of another verb to express their signification of meaning perfectly: and be these, may, can, might or mought, could, would, should, must, ought, and sometimes, will ...
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Past perfect progressive (progressive, perfect): "I had been eating" Aspects can also be marked on non-finite forms of the verb: "(to) be eating" (infinitive with progressive aspect), "(to) have eaten" (infinitive with perfect aspect), "having eaten" (present participle or gerund with perfect aspect), etc.