【语法】should和现在虚拟式

对应页码 unit 39 p78-79

注意 should后面常常跟被动语态，或者be adj.

base form 词根，词干

present subjunctive 现在虚拟式

可以理解成省略掉should之后，动词虽然是原型，一般现在时，但是不表示事实，表示的是“虚拟”、还没发生的情况。

具体词例：

stipulate that sb (should) do sth 规定

建议：advise/suggest that sb (should) do sth

命令、请求：ask, command, demand, instruct, order, request, beg, require that sb (should) do sth

其他：

insist that sb (should) do sth

intend that sb (should) do sth

prefer that sb (should) do sth

urge that sb (should) do sth

warn that sb (should) do sth

在非正式语体中，that从句也可以用正常时态 。