How to parse the grammar of a sentence that appears to have two tensed verbs

This question came from a student of mine – he wanted to know how to parse the grammar of this sentence, which appears to be simple but clearly is not: Peter seems to have found his glasses. Sentences of this form are very common in English but the syntax is puzzling. The main verb is … Read more

Is it ok to say “something I will have come to learn later in the course”?

I have written It lacks exact references to the book, something about argumentative analysis I will have come to learn later in the course. I wonder if this is correct and what this tense would be called. Perhaps it would be called “future past future perfect”? Answer According to the Cambridge Dictionary it is future … Read more

“He is said to have known peo­ple” vs “He is said to know peo­ple”?

I came aross a ques­tion like this: As a pub­lic re­la­tions of­fi­cer, he is said ________ some very in­flu­en­tial peo­ple. to know to have known There are two avail­able an­swers to this ques­tion. The first is to know and the other is to have known. I chose the first ver­sion, to know, but it said … Read more

Confusing uage of present perfect infinitive where past perfect should be used

In one of the renowned grammar books I’ve come across an example of confusing usage of the perfect infinitive, where in my opinion past perfect should be used instead: He is thought to have been deeply depressed at the time, but recovered later. The above sentence is placed in the past, so why there is … Read more

Present continuous tense with a perfect continuous infinitive

Is this sentence correct? My niece is pretending to have been playing the piano for a whole hour. With this sentence I want to describe a situation when a girl is pretending at the moment of my stating the fact and at the same time I’d like to mention the duration too. If to divide … Read more

Repeating the subject rather than using perfect infinitive in passive sentences

Is it allowed to rewrite [repeating the subject] this passive sentence: She is reported to have died in a plane crash. into this: She is reported that she has died in a plane crash. I’m in doubt because the first passive sentence has the construction: subject + passive verb + infinitive and I don’t know … Read more

“Would have been able to do something” vs “would have been able to have done something”

Tell me please if there is any difference in meaning between the following sentences. If I had worked overtime, I wouldn’t have been able to finish my project. If I had worked overtime, I wouldn’t have been able to have finished my project. I cannot see the difference but feel there is a small one, … Read more