Adverb Placement

[Will17]

Hello!

Where are the adverbs supposed to be in these sentences, please? :

-Does it happen often? /Does it often happen?

-It's almost necessary everywhere!/ It's necessary almost everywhere!

-I can't always be planning things! /I can't be always planning things!

Thank you very much for your help.
Will

[5jj]

-Does it happen often? /Does it often happen? No difference.

-It's almost necessary everywhere! This suggests that it is not 100% necessary/obligatory
It's necessary almost everywhere! This suggests that it is not necessary (for example) in 95 % of places, but not in 100%.

-I can't always be planning things! /I can't be always planning things! No real difference.

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