Student or Learner
I'm confused about the difference between be going to and will.
For example, one of the children will run or is going to run in the race tomorrow.
The garderner will water or is going to water the flowers in ten minutes.
The Greens will travel or are going to travel to France next month.
Will or be going to, or both are right?
Thank you for your help.
They are often interchangeable.
However, you'll find that "will" is often used for promises or predictions.
I promise, I will pick you up at 3 and I won't be late!
The population of the US will reach 400 million in approximately 14 minutes.
And "going to" is for plans or intentions.
I'm going to Tuscany for vacation this fall.
I'm going to lose 15 pounds by September.
I would use "is going to" for your examples, unless you are predicting the gardener one. (Look, the pretty next door neighbor just came out to sunbathe nude. Now just watch - the gardener will come water the flowers in 10 minutes.)
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.