Grammar

1. actions that started & finished in the past (specific time)

     e.g.: I worked very hard this morning

2. actions completed in the past (specific time)

    e.g.: He went to the gym last night.

1. actions that started in the past & is still happening now

    e.g.: I have worked hard for two days.

2. actions completed in the very recent past (already, just)

    e.g.: He has just gone to the gym.

3. Life experiences (ever, never)

   e.g.: Have you ever been to Singapore? 

4. Past actions with a result in the present

    e.g.: He's broken his leg, so he can't go on a holiday.

Finished time

in + year (in 1999)

yesterday

last night/last week,…

time + ago (3 hours ago)

Unfinished time

this morning/this month…

for/since (for + duration, since + starting point)

recently/so far

just/already

ever/never