\tBoth \u518d (zài) and \u53c8 (yòu) express the duplication of an action and can be roughly translated in English to "again". However, \u518d is used to express actions that have not yet occurred (the "future again") and \u53c8 is used for actions that have already occurred (the "past again"). They're not interchangeable.<\/p>\n
\t\u518d is used to express repetition of an action in the future<\/strong><\/p>\n \t\u518d is used to express something that has already happened and will happen again.<\/p>\n \tStructure <\/strong> \t<\/p>\n \tExamples<\/strong> \t<\/p>\n \t\u518d can be used to say "another"<\/strong><\/p>\n \tAside from expressing the repetition of an action, \u518d can also be used to express the equivalent of the English word "another".<\/p>\n \tStructure <\/strong> \t<\/p>\n \tNote that the "Object" mentioned above is usually also going to have an \u4e00 and a measure word in front of it. You'll see that in the examples below.<\/p>\n \tExamples <\/strong> \t<\/p>\n \t\u518d can be used to say "and then"<\/strong><\/p>\n \t\u518d can be used with \u5148 to express sequential order. (ex. Do this….and then this….) In some cases, \u518d can appear by itself to simply mean "and then." While this doesn't sound so easy to confuse with \u53c8, it's actually quite common for intermediate learners to misunderstand this use of \u518d as meaning "again," so it's definitely worth mentioning here.<\/p>\n \tStructure <\/strong> \t<\/p>\n \tExamples<\/strong> \t<\/p>\n \t\u53c8 is used to express repetition of an action that has already occurred in the past<\/strong><\/p>\n \t\u53c8 is used in declarative sentences and describes the simple repetition of actions. This repeated action has already occurred once in the past.<\/p>\n \tStructure<\/strong> \t<\/p>\n \tExample<\/strong> \t<\/p>\n \t\u53c8 adds emotional coloring to events recurring in the future<\/strong><\/p>\n \t\u53c8 is sometimes used to express that something that has happened before is going to happen in the immediate future. In this case, it usually appears with \u8981, \u53ef\u4ee5, \u80fd, or \u662f. This usage often expresses exasperation or impatience with something happening yet again, but sometimes it's more neutral, or even happy.<\/p>\n \tStructure<\/strong> \t<\/p>\n \tExample <\/strong> \t<\/p>\n \t <\/p>\n
\t\u6211\u4eec \u4e0b\u6b21 \u518d \u6765 \u8fd9\u91cc \u5427\u3002<\/div>\n
\t\u6211 \u8981 \u518d \u770b \u4e00\u90e8 \u7535\u5f71\u3002<\/div>\n
\t\u6211\u4eec \u5148 \u505a \u4f5c\u4e1a \u518d \u53bb \u9152\u5427\u3002<\/div>\n
\t\u8fd9 \u4e2a \u8001 \u7537\u4eba \u53c8 \u6765 \u4e86\u3002<\/div>\n
\t\u660e\u5929 \u53c8 \u662f \u661f\u671f\u4e00 \uff01 <\/div>\n