Hold in

contenir

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