couldn是什么意思？

In post-war Japan, the economy wasn’t doing so great, so you couldn’t get everyday-use items like household cleaners, says Lisa Katayama, author of Urawaza, a book named after the Japanese term for clever lifestyle tips and tricks, So people looked for ways to do with what they had.

As a person who writes about food and drink for a living, I couldn't tell you the first thing about Bill Perry or whether the beers he sells are that great.

Most people couldn't afford to do otherwise.

Could you reproduce Silicon Valley elsewhere, or is there something unique about it?It wouldn't be surprising if it were hard to reproduce in other countries, because you couldn't reproduce it in most of the US either.

Of course, I didn’t know she couldn’t read, so there I was submitting thesereports, he said, She would put check marks on them like she hadbeen reading them.

I looked through my suitcase but couldn’t find anything to wear.