I’ll try to come vs I’ll definitely try to come

Examples:

• I'll try to come to the party, but I might have other plans.
• I'll try to come to the meeting if I can rearrange my schedule.
• I'll try to come to the concert if I can get a ticket.
• I'll try to come to the game if I finish my work on time.
• I'll try to come to the event if nothing else comes up.

Alternatives:

• I'll do my best to come.
• I'll make an effort to come.
• I'll attempt to come.
• I'll see if I can come.
• I'll try to make it.

Examples:

• I'll definitely try to come to the party; I wouldn't miss it for the world.
• I'll definitely try to come to the meeting; it's important to me.
• I'll definitely try to come to the concert; I've been looking forward to it.
• I'll definitely try to come to the game; I'll rearrange my plans if needed.
• I'll definitely try to come to the event; I'll make sure to be there.

Alternatives:

• I'll make sure to come.
• I'll be there for sure.
• I'll definitely be there.
• I'll do everything I can to come.
• I'll make it a priority to come.