suggestion
suggestion（建议）后面可以接以that引导的从句，从句里用should或属于虚拟现在式的动词。例如：
- His suggestion is that the regulations should be revised.
- His suggestion is that the regulations be（不用are）revised.
- His suggestion was that the regulations should be revised.
- His suggestion was that the regulations be（不用were）revised.
