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He had been there Been here he had Here he had been Had he been here
had been broken into; stolen had been broken into; had been stolen has been broken into; stolen has been broken into; has been stolen
因SA的非特异性结合低于AV而在标记酶结合物时更为常用 AV富含的色氨酸与其活性密切相关 1个AV或SA分子具有6个生物素分子结合位点 辣根过氧化物酶与AV或SA的标记方法常用过碘酸钠法 几乎所有用于标记的物质均可以同AV或SA结合
has been broken into; has been stolen had broken into; had been stolen has been broken into; stolen had been broken into; stolen
Hadn’t it been Had it been not Not had it been Had it not been
had not been advised; will be addicted to had not been advised ; would be addicted to had not been persuaded;would be addicted to had not been persuaded; would have been addicted to
were not , would die were not to be, would die should not be ,would have died hadn’t been ,would have died
He asked what had the weather been said it had been awful
AV：TSNSHA/13MAR AV：PEKSHA/10DEC/1100 AV：CA983/01DEC AV：TSNSHA/CA983 AV：TSNSHA/CA983/Y
have been saved; had been treated be saved; have been treated be saved; had been treated had been saved; would have been treated
AV:D/航段/日期 AV:E/航段/日期 AV:航段/日期/D AV:航段/日期/E
they had been stolen. they had been strangled. they had been dissected. they had been buried.
was published；had been had been published；had been has been published；has been was published；has been
AV：TSNSHA/13MAR AV：PEKSHA/10DEC/1100 AV：CA983/01DEC AV：TSNSHA/CA983 AV：TSNSHA/CA983/Y
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