This is how you do it.

We're speaking.

And for writing, if possible.

If it makes sense, think seriously about using past tense except for was and were the verbs don't change.

They don't use s.

And then you won't have to worry about that.

Miss.

Take The other possibility is, if it makes sense for your meaning, use models can go.

We'll see.

Um, may eat.

No s is on any one of those, so you don't have to worry about it.

It's a small grammar problem, but it makes a big impression on people if you make a mistake and if you do it right, they pay no attention at all.

They'll be able to hear your idea and think about what you have to say and not about any mistake that you make.

So avoid trouble.