这个句子的时态是______。I have been looking for my lost book for three days, but I still haven't found it.
举一反三
- I to my hometown in three years. I miss my old friends badly. A: went B: have been C: haven’t been D: was
- I have been searching in the library for 3 hours, but I ____________found the book I want yet. A: hasn't B: did't C: haven't D: don't
- I have not found my book yet; in fact, I am sure _____ I could have done with it.
- 'I told Dom to email you three days ago.' → She said that she had told Dom to email me three days ___, but it's been a week now and I still haven't heard. A: then B: ago C: efore
- ______ I had been looking for two days, I found her at last.