This example uses the Present Perfect Continuous ("I've been looking") and the Present Perfect with the past participle of 'find' (found) in the negative to describe a continuous action without a result up to now.
Este exemplo usa o Present Perfect Continuous ("I've been looking") e o Present Perfect com o particípio passado de 'find' (found) na negativa para descrever uma ação contínua sem resultado até agora.
| Front | I've been looking for ages but I haven't --- (find) my keys yet. |
|---|---|
| Back | I've been looking for ages, but I haven't found my keys yet. |
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