日本語 Japanese Ask Questions Thread 3

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Japanese Ask Questions Thread2
http://dis.4chan.org/read/lang/1206158123/1-40

There's something I'm curious about. I'm not studying Japanese, but I've watched some noticed in Japanese videos/movies/song lyrics that whenever someone says something like "help", "look", "don't do this", the verb ends in the vowel 'e'.
Does ending the verb with 'e' make it a command/imperative? Or something like that.