“Of which” is part of a relative clause. She discovered so many spiders, of which she was most afraid. He answered all the listening and reading exercises, of which the test mostly consisted. The team won a silver medal, of which they were very proud.
‘What’ stands as the subject and ‘which’ is the object of the sentence, also ‘which’ can stands as subject of the which clause that replace the whole clause of the previous sentence. ‘What’ is used to ask an unknown thing while ‘which’ means a choice among several things.
To start with, we use “that” when we refer to people, animals, and things. We use “which” when we refer to animals and things. However, the main difference between both depends on the clause. If the clause is restrictive, you need to use the relative pronoun that, without it, the meaning would be unclear.
Using “Which,” “Who,” and “That” “Who” is used for people. “Which” is used for things, and “that” can be used for either. (Note, however, that using “that” for people is considered informal.)
“Which” is more formal when asking a question that requires a choice between a number of items. You can use “What” if you want, though. Generally speaking, you can replace the usage of “which” with “what” and be OK grammatically. It doesn’t always work the other way around, however.
Strictly speaking, when referring to one or more of a definite set of values, the word ‘which’ should be employed. When referring to one or more of an unknown or infinate set of values, the word ‘what’ would be used instead.
Both are grammatically acceptable, but there are differences in how they are used. “I am thinking of you ” is a complete sentence, telling what you are doing. “I think of you ” usually requires a modifier, as: “I think of you every day.” It can also be used in a dependent clause, as: “When I think of you I sigh.”
Both are correct. The difference is that “what” is an open choice, but “which” suggests that there are just a small number of days to choose from.
Thinking “about” something is a longer, more continuous action. However, when talking about people we often use ” thinking of you ” to mean ” thinking about you ” It’s easy to see why this would be confusing to people trying to learn English.
When you are determining whether you should use who or that, keep these simple guidelines in mind: Who is always used to refer to people. That is always used when you are talking about an object. That can also be used when you are talking about a class or type of person, such as a team.
You say in that case or in which case to indicate that what you are going to say is true if the possible situation that has just been mentioned actually exists. Perhaps you’ve some doubts about the attack. Members are concerned that a merger might mean higher costs, in which case they would oppose it.
A defining relative clause identifies who or what we are speaking about, whereas a non – defining relative clause just gives us more information about who or what we are speaking about. A non – defining relative clause is separated from the main part of the sentence by commas.
Your first choice when talking about more than one person is “( two ) people “. ” Persons ” only makes sense if you mean “individuals” and as 郭东兴 has pointed out, this is quite uncommon. Persons is an old word, from formal English.
“ Persons ” as Plurals. Person and people both derive from Latin, but from different words. That practice did not become standard, and nowadays, the plural persons is only considered correct in legal contexts and, occasionally, when deliberately referring to humans individually rather than collectively.
In titles of creative works such as novels, songs, and albums. In film credits for stories, screenplays, etc., & indicates a closer collaboration than and. The Writers Guild of America uses & to denote two writers collaborating on a specific script. Inside tables or parentheses when space is limited.