Why 这么 / 那么 are placed before the action verb?
[这么 +v ] = [v + like this/ this way]
[那么 + v] = [v + like that/ that way]
Example:
大家都[这么][说] = everyone [says it] [like that]
你不该[那么][做] = you shouldn't [do it] [like that]
~
[这么 + adj ] = [ this + adj]
[那么 + adj ] = [ that + adj]
Example:
[这么][坏] = [this][bad]
[那么][好] = [that][good]