could not have solved是不可能解决
举一反三
- This could have been solved more quickly by writing the following expression(表达式).
- was solved是已解决
- How could California’s drought crisis be solved according to some researchers?
- 永远不可能完全解决 A: one that could never be completely resolved B: I no no longer dwell on it.
- come to help me, I wouldn’t have solved the problem.