What does もう mean in this sentence?


彼はもう英語を教えるまい。 (Most probably, he won't teach English any more.) I got this
sentence from [this
thread](https://japanese.stackexchange.com/questions/487/does-ou-you-mashou-
conjugation-have-a-negative-form/1482#comment13314_1482). もう doesn't seem
necessary to use or have. Isn't the meaning the same if it was like this:
彼は英語を教えるまい。?




In this case もう gives the meaning "any more". Without it, the sentence would
mean:  
"He probably doesn't teach English".

Note that 教えるまい has the same meaning as 教えないだろう. The latter form is more
commonly used but the former is still used in writing sometimes.




In this case もう gives the meaning "any more". Without it, the sentence would
mean:  
"He probably doesn't teach English".

Note that 教えるまい has the same meaning as 教えないだろう. The latter form is more
commonly used but the former is still used in writing sometimes.

