Here's the answer:
“え〜、見えないですね！”
(ē, mienai desu ne)
Watch a real native speaker say it:
Here's how it sounds in a textbook:
You could also say:
- えー、見えないですね！
- え、見えないですね！
Fun fact: the hundreds of thousands of people learning Japanese with Memrise get this phrase correct 93.62% of the time!
