Join in

se joindre à

Regular verb, phrasal verb.

In speech, the helping verbs shorten: I’m, he’s, we’re, I’ve, I’ll, I’d.

Newbie

Enough to talk about now, the past, and your plans, and to give instructions.

Present simple
Habits, facts, and how things usually are. To say no or ask, add do or does: I don't join in, he doesn't join in.
1. I / you / we / they join in
2. he / she / it joins in
Present continuous
What is happening now, and plans already arranged: we’re leaving tomorrow.
1. I am joining in
2. you / we / they are joining in
3. he / she / it is joining in
Past simple
A finished action at a past time: yesterday, in 2020. To say no or ask, add did: I didn't join in.
1. I / you / he / she / it / we / they joined in
Future with going to
Plans and intentions, and what you can see coming: it’s going to rain.
1. I am going to join in
2. you / we / they are going to join in
3. he / she / it is going to join in
Imperative
Orders, advice, and instructions. Let’s suggests doing it together. To say no: don't join in.
1. (you) join in
2. let's join in