FOCUS : BEING INFLUENCED AND INFLUENCING
The Present continuous can be used to show an action which is happening at the time of speaking / writing [NOTE: when we say špeaking' writing is also included although shifting to the past often requires rearranging the choice of words [synonyms]].
I am having dinner at the moment. [In the past becomes I was having dinner at the time]
The Past continuous can be used to show an action which was happening in the past.
It is important to remember that the Past continuous is usually used to show an action which was happening when another action, which is usually shorter, happened at the same time / stopped the continuous action or started after the continuous action.
I was having dinner when Sarah called me.
I was walking along the beach when it started raining.
The Future continuous is used to show that an action will be happening at a time in the future.
I will be having dinner at my parents’ house tomorrow.
Here are some verbs in the continuous tense:
Have
He is having a shower now. (Present continuous)
He was having a shower when the phone rang. (Past continuous)
He will be having a shower, so take the house keys when you go out. (Future continuous)
Run
He is running right now. (Present continuous)
He was running when I saw him yesterday. (Past continuous)
He will be running tomorrow morning. (Future continuous)
Watch
I am watching a really good film now. (Present continuous)
I was watching a really good film when there was a power cut. (Past continuous)
I will be watching my favourite TV show when you arrive tomorrow. (Future continuous)
Do
I am doing my homework at the moment. (Present continuous)
I was doing my homework all night. (Past continuous)
I will be doing my homework tonight. (Future continuous)
AND VERBS THAT DO NOT TAKE CONTINUOUS FORMS
There are some verbs that do not take the continuous tense. These are verbs that explain or describe states rather than actions.
I like pasta. NOT I am liking pasta.
I am tired. NOT I am being tired.
I heard the car crash from my house. NOT I was hearing the car crash from my house.