TAILIEUCHUNG - The grammar of the english verb phrase part 44

Tham khảo tài liệu 'the grammar of the english verb phrase part 44', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 294 5. The absolute use of the present perfect He has often tossed the ball at me while I wasn t I haven t been looking. I ve noticed some hair loss while I ve been doing Atkins the Atkins diet . www The past tense could not be used. A lot of stuff has changed while you ve been gone. www The past tense could also be used especially in American English. Reading a few sites on CSS has brought it home to me how much I ve forgotten while I ve not been adding anything to any sites. www The past tense could not be used. Has anything really embarassing ever happened to you or anyone while you ve been performing www The past tense could also be used. The precise rules governing the choice of tense here are not clear but we notice the following interpretational difference between the tense options in the first example repeated here Has he ever mentioned his son while he has been talking to you Has he ever mentioned his son while he was talking to you The first example presupposes that he has been talking to you is true i. e. that this is not within the scope of the question. The sentence is interpreted as During the time s that he s been talking to you has he ever mentioned his son . In contrast in the second example the question has scope over both clauses Has it ever been the case that he was talking to you and mentioned his son in the course of that conversation . As we will see in it is only in the latter example that the situation time of the while-clause is temporally subordinated see to the situation time of the head clause. Unlike up-to-now perfects indefinite perfects are compatible with ad-verbials denoting an indefinite time in a period leading up to now without saying anything about the precise location of the situation time in that period. Adverbials like before in the past recently lately just and this minute can be used in this way Don t worry. I have dealt with problems of this kind before. This has often happened in the past. This telegram .

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