介词 - 持续时间和重复介词

used to indicate a temporal interval or a period of time during which an event or action occurs

used to express that something happens continuously from the beginning to the end of a period of time

used to indicate a time duration

used to indicate a timeframe or deadline; within or before the specified time

before a specific period of time passes

used to indicate the span or duration of time during which something occurs or continues

以上

used to indicate the duration or span of time during which an action or situation occurs

during the whole period of time of something

up to a particular event or point in time

used to show that something continues or lasts up to a specific point in time and often not happening or existing after that time

used to describe a specific point or period of time that extends until a certain moment or event

used to indicate continuous or sequential occurrence of an action or event

used to indicate repetition of an action or event