In the sentence "I knew I should work , and yet I watched TV", is the word "yet" an averb or a subordiante conjunction (provided that a coordination one cannot be preceded by and) ??
Hello Chiklaine

(1) I knew I should work, and yet I watched TV
I think you can take the 'yet' as an adverb. Though OED and Webster do not mention anything about it, my E-J dictionary is classifying the 'yet' of the collocation 'and/but yet' as an adverb.

I personally think it is not very useful for learners to know what part of speech such a word like 'yet' belongs to. The current system of English word classification was formed basically to accord with the module of Latin grammar. But the word like 'yet' is so Teutonic in origin that it looks not quite fit to the classification. For example, your sentence can be rephrased as;
(2) I knew I should work, yet I watched TV
The two sentences (1) and (2) are the same in the meaning but yet the traditional grammar says "yet" in (1) is an adverb and "yet" in (2) is a conjunction. Do you think this kind of word classification makes sense?


My two cents. No. I don't think any kind of word classification makes sense other than for the most obvious nouns, verbs, and adjectives. At least I don't see how it helps anyone speak or write English more effectively.

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I have an experience of disputing with other Japanese people for more than a week over such an issue like: "which part of speech is the UP in the sentence 'Next morning I was UP early'?".

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Your example makes my point even more clearly!