study help: Acronyms. Frecuency adverbs and use of tenses

Juan Antonio Gil wants to share this tip with you. Below is the original message.

Hi, I found out a few fun acronyms I think could be useful for the class.
>
> PRESENT SIMPLE TENSE --> DINOSAUR
> -----------------------------------------------
> D : EVERY DAY
> I :
> N : NEVER
> O : OFTEN
> S : SOMETIMES
> A : ALWAYS
> U : USUALLY
> R : RARELY
>
> PAST SIMPLE TENSE --> OIL WAY
> ----------------------------------------
> O : ON (I went to the cinema on Sunday)
> I : IN
> L : LAST
>
> W : WHEN
> A : AGO
> Y : YESTERDAY
>
> PRESENT PERFECT SIMPLE --> JEANY
> ---------------------------------------------
>
> J : JUST
> E : EVER
> A : ALREADY
> N : NEVER
> Y : YET
>
> PRESENT PERFECT SIMPLE CONTINUOUS --> FLOT & SPOT
> -------------------------------------------------------------------------
>
> F : FOR
> L : LENGHT ------> FOR
> O : OF
> T : TIME
>
> S : SINCE
> P : POINT -------> SINCE
> O : OF
> T : TIME
>
> HOW LONG, FOR, SINCE
>
> How long have you been playing tennis?
>
> I have been playing tennis since 1994
> I have been playing tennis for seventeen years
>
>
> A mí me han resultado muy esclarecedores y divertidos. Y pensé que como es
> difícil saber cuando usar uno u otro este aporte nos vendría bien a
> todos. 
>Juan Antonio Gil.