I have decided to stay home.

[dwni1]

For example, I've decided to stay home. Are the following examples interchangeable? Can I use them in present perfect?

I have decided to stay home.
I have made a decision to stay home.
I have made my mind to stay home.

 

[Tarheel]

The third one should be, "I have made up my mind to stay home." In what context would you say that?

In my experience people just say "I've made up my mind" when they reach a decision about something.

 

[emsr2d2]

For example, I've decided to stay home. Are the following examples interchangeable? Can I use them in the present perfect?

1. I have decided to stay home.
2. I have made a the decision to stay home.
3. I have made my mind up to stay home.

All three are grammatical (with my change to #2). In everyday speech, we'd be much more likely to use "I've" than "I have".
Always number sentences when you give us more than one to look at.

 

[dwni1]

Thank you so much! Do they have the same meaning?

 

[dwni1]

The third one should be, "I have made up my mind to stay home." In what context would you say that?

In my experience people just say "I've made up my mind" when they reach a decision about something.

For instance, I am talking to somebody on the phone and he asks me to go out but I decide to stay home.
I want to know if I can use all the sentences in this context.

 

[Tarheel]

I've made up my mind. I'm staying home.

 

[Skrej]

For instance, I am talking to somebody on the phone and he asks me to go out but I decide to stay home.
I want to know if I can use all the sentences in this context.

The first one (using a contraction) would be the most natural.