However, you should make sure that she understands what she is writing, otherwise it would be all in vain.
P.S. I know that the word 'However' implies that there is another sentences before this one and in fact there is.
Dice However, you should make sure that she understands what she is writing ; otherwise , it would be all in vain. As shown. Note the usual pattern of punctuation with an adverbial conjunction ( otherwise ).
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DiceHowever, you should make sure that she understands what she is writing; otherwise, it would be all in vain.
As shown. Note the usual pattern of punctuation with an adverbial conjunction (otherwise). Also, ... it would all be in vain.
CJ