连词 - 时间连词

used to say that something is happening at the same time with another

当, 随着

used to indicate that two things happen at the same time or during something else

当, 在...的时候

at any or every time

每当, 无论何时

used to indicate a period of time during which an action takes place or a state of affairs exists, often denoting simultaneous or concurrent events

当...的时候, 在...期间

used to express a period from a specific past time up to now or another specified point

used to denote a continuous period of time starting from a particular event or point in the past and continuing until the present or a specified time

自从, 自那时起

while something else is happening

当...的时候, 在...的同时

used to express that something happens at the same time or right after another thing

一旦, 当一...时

used to describe a duration or period of time during which something happens or continues to be true

只要, 在……期间

used to describe a duration or period of time during which something happens or continues to be true

只要, 在...期间

used to indicate a point in time before which an action or event has occurred or will occur

到…的时候, 在…之前

used to emphasize the present moment in relation to the topic under discussion

此时此刻, 在这一时刻

used to express the idea of something happening or being done at the appropriate or necessary times

根据需要, 视需要而定

used to indicate simultaneous action to show that one action or situation occurs at the same time as another

即使在, 正当在

used to indicate that if certain conditions or situations occur, certain actions or responses will follow

如果和何时, 若及何时