过去虚拟:条v过分;主@+V过分
现在虚拟:条v过;主@+v原
将来虚拟:条v过were to/should+v原;主@+v原
省if
but;or;that;other;wise
半真半虚
but for;without;under;with
主语从句:It's+某些词+that
一些词后
不表主张建议时不用虚拟
同位语从句:一些词后
in case;lest for;fear;that
真实性大,不用虚拟
构成:should
wish
if only
as if/as though
过去:that+主+had+v过分
现在:that+主+v过
将来:that+主+would/might+v原
would rather/would prefer
would sooner/would as soon
过去:had+v过分
现在:v过
将来:v过
It's (high/about) time that...
构成:v过
v原
necessary,important,suggest
order,strange,natural,insist
insist,command,suggest
advise,prpose,demand,require
order,desire,ask
insistence,suggestion
order,proposal,demand