Concerned x Worried: Como utilizar

Hi folks....
I'd like you to help me, cuzz I've got some doubts in some simple stuff...
1° -I was thiking...what is the main difference between "worried and concerned", is there any difference in using them?
Maybe any meaning difference?

and there is a part of english that I already know how to use, but I don't know how to explain...
2° - what is the best way to explain the using of 2 verbs, one in present simple and the other present continuous...
kinda "Stop Smoking"..."keep watching"... and so forth

3° - and the last doubt...there are some verbs that adding "A" to the beggining, they get the same meaning of adding "ING" to the end.....( I THINK SO, I'M NOT REALLY SURE ABOUT IT )
I better give some samples to be clearer.
He's waiting for you....He Awaits you;
They are sleeping... They are asleep;
She is waking up....She is awake*. ( actually, this one I'm not that sure that could be used like this )

Thank you guys...and I'm sorry for making these big questions in the first time I come here :D

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1 resposta
Donay Mendonça 22 107 1.6k
Olá Guto,

1)"Concerned"é um pouco mais formal que "worried".Sim,há diferenças de uso mas estas não são relevantes neste contexto.
2)No caso dos dois verbos mencionados é necessário o uso do "ing" para que a estrutura fique da forma natural.Veja algums verbos onde isto acontece:
Enjoy/quit/feel like/stop/keep/go on/carry on/...
3)Estes casos são limitados a poucos verbos.Normalmente a forma com "ing" é mais comum.No caso do "awake" você poderia dizer:awake=not sleeping,up,not asleep.

The best of british to you!