Dangling Participle

[deepcosmos]

Hello, Tdol !

Many thanks for your previous advice.

1. I feel [like] I'm working my butt off for nothing ; here it's functioning as a conjunction.

If so, can I be understood that the [like] has originally been [a prepostion], but here it's
functioning as [a conjunction]?

2. Re para.2 ; Caffeine stimulates the central nervous system, [causing an increased heart
rate and alertness] ;

Can I consider above [ ] as so-called "Dangling Participle" ?

Best Rgds,

[Tdol]

1 Yes
2 I don't see it as unclear here.

[deepcosmos]

Many thanks for yr reply.

Best Rgds,