| 单词 |
when(when, while, as) |
| 例句 |
when, while, as
这些连词均可表示“当……时”引出时间从句。
when → 所引导的从句，其谓语动词既可是持续动词，也可是短暂动词；谓语动词动作发生的时间可以与主句谓语动词的动作是同时，或之前、之后。
while → 句中的谓语动词应为持续动词，不用短暂动词，谓语动作发生的时间通常与主句谓语动词动作发生时间是同时。
as → 侧重指从句与主句的动作同时进行，谓语动词可以是持续性的，可以是短暂性动词。
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| 随便看 |
- penetrate(pierce, penetrate, prick, stab, thrust)
- peninsula(island, peninsula)
- people(nation, people, race)
- people(people, masses, crowd, throng, mob)
- percentage(percent, percentage)
- percent(percent, percentage)
- perception(vision, eyesight, sight, perception)
- perfect(complete, perfect)
- perfect(improve, better, perfect, refine)
- perfect(perfect, ideal)
- performance(act, action, deed, operation, performance)
- performer(actor, player, performer)
- perform(perform, conduct, do, execute, fulfil)
- perhaps(maybe, perhaps, possibly, probably)
- peril(danger, risk, hazard, menace, peril, threat)
- period(age, epoch, era, period, times)
- periodical(magazine, journal, periodical, publication, newspaper, review, press)
- perish(die, decease, expire, perish, pass away)
- permanent(permanent, eternal, perpetual, everlasting, endless)
- permit(allow, let, permit, leave, authorize)
- perpendicular(vertical, perpendicular, upright, erect, plumb)
- perpetual(permanent, eternal, perpetual, everlasting, endless)
- perplex(puzzle, bewilder, confuse, embarrass, perplex, baffle, confound, distract)
- persevere(insist, persist, persevere, adhere, cling)
- persistent(continual, continuous, successive, constant, persistent)
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