Regarding the grammatical structure of the English...

The English verb system has only two moods: indicative and subjunctive, while the imperative is categorized as a form of command rather than a grammatical mood.

Verb tenses in English, such as the "present perfect" and the "past perfect," indicate aspects related exclusively to chronological time, with no connection to the continuity or sequence of actions. 

In the passive voice, the direct object of the active sentence is often omitted and replaced by an adverb of manner that indicates the agent of the action.

The infinitive in English, as in "to run" or "to sing," cannot be used as the subject of a sentence, being restricted to the function of a verbal complement. 

English uses particles like "will" and "shall" to indicate the future, but the language does not have a formal future tense in its grammar.