---The window is dirty.
---I know. It ______ for ages and I’m considering giving the task to our children.
A．hasn’t cleanedB．hasn’t been cleaned
C．wasn’t cleanedD．didn’t clean
B

試題分析：考查時態(tài)語態(tài)：句意：--這個窗戶很臟。--我知道，已經(jīng)很長時間沒擦了，我在考慮把這個任務(wù)給孩子們�？芍皯羰沁^去到現(xiàn)在很長時間沒有被擦，用現(xiàn)在完成時的被動。選B。
點評：英語中的時態(tài)主要由動詞的形式?jīng)Q定，因此在學習英語時態(tài)時，要注意分析動詞形式及具體語境，想象在那個特定的時間動作所發(fā)生的背景，這個動作是經(jīng)常性動作、一般性動作、進行性動作、完成性動作還是將要發(fā)生的動作。這題關(guān)鍵是for ages這個時間。是和現(xiàn)在完成式或現(xiàn)在完成進行時連用。
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