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The bases and their meanings and uses

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Base
Use/Meaning
a   Can not be used by itself but becomes the plain form negative simply by adding -nai. (ex. hanasanai - I won't say anything.) If the verb ends in う (u) then the end for Base 1 becomes わ (wa). (ex. au (Base 1) -> awa)  
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hi   in most cases, a noun when used by itself but is primarily used with the formal form of the verb.  
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u   The main form (the one that would be found in the dictionary) and is also the plain form present/future tense.  
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e   Is most often used as "if verb" by adding -ba. (ex. hanaseba - If he'd just say something.) It can also be used by itself as a command form but it is extremely rude and I recommend not using it at all.  
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ou   Is used by itself as the "let's" form. (ex. hanasou - Let's talk.) We will get into other ways it's used in later lessons.  
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te   Can be used by itself as a plain form command. It is not rude but should only be used with close friends and children. By adding kudasai it becomes the polite form command. Base "te" can also be used in other ways that we will get into in later lessons.  
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ta   Is merely Base "te" with an "a" sound on the end instead of an "e" sound. It is mainly used by itself as the plain form past tense. (ex. hanashita - I talked.) We will get into other ways it's used in later lessons.  
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