Add usage

Author: high-moctane

README.md

@@ -1,2 +1,50 @@
 # mocword
+
 Predict next English words (｀･ω･´)
+
+## Usage
+
+### One shot mode
+
+```
+$ mocword -q "this is "
+the
+a
+not
+an
+what
+to
+that
+true
+done
+so
+```
+
+```
+$ mocword -q "one of t" --limit 3
+the
+them
+these
+```
+
+### Interactive mode
+
+```
+$ mocword
+this is
+the a not an what to that true done so
+one of t_
+the them these those their two three this that themselves
+```
+
+The underscore is a white space.
+
+## Query string
+
+Ends with a white space -> predict successive words.
+
+Ends without any white space -> predict words which begin with the last word's prefix.
+
+## License
+
+MIT