A 条件现在时由would／should+动词原形构成（用于第一人称），或由would+动词原形构成（用于其他人称）。肯定式：         I would／I’d work／I should work                you would／you’d work等否定式：         I would not／wouldn’t work或                       I should not／shouldn’t work                        you would not／wouldn’t work等疑问式：         would／should I work？                       would you work？等否定疑问式：  should I not／shouldn’t I work？                       would you not／wouldn’t you work？等B 这种形式用于：（a）条件句中。（参见第221节至第229节。）（b）would和should的特殊用法中。（参见第二十二章。）（c）过去将来时。当主句的主要动词是过去时的时候，从句中就必须用 would／should而不用 will／shall：I hope（that） I will／shall succeed．我希望我会成功。I hoped（that） I would／should succeed．我曾希望我会成功。I know（that） he will be in time．我知道他会赶得上的。I knew（that） he would be in time．我当时知道他会赶得上的。He thinks（that） they will give him a visa．他想他们会给他签证。He thought（that） they would give him a visa．他本想他们会给他签证。I expect（that）the plane will be diverted．我料想飞机会改变航线。I expected（that）the plane would be diverted．我本料想飞机会改变航线。（关于will／shall，would／should在间接引语中的用法，参见第三十一章。）