He thinks that he'll have earned his first million by the age of thirty.

[Adrianna95]

Good afternoon teachers,

There is a sentence:
1) He thinks that he'll have earned his first million by the age of thirty.

Is it correct to use the Future Simple tense and just say:
2) He thinks that he will earn his first million by the age of thirty ?

What is the difference in meaning between them? Does the first sentence inform us that he has already started doing something to achieve his goal?

 

[5jj]

1) He thinks that he'll have earned his first million by the age of thirty.

The use of the modal perfect form suggests that the earning of the first million will be in the past by the time he is thirty.

2) He thinks that he will earn his first million by the age of thirty ?

This predicts the future happening more neutrally.

 

[teechar]

There is a sentence:

That's not natural. You can instead say, for example:
Please consider the following sentence(s).
or, even better: just go ahead and ask your question without any introduction.

 

[Rover_KE]

Preferably, Adrianna, please tell us the source and author of any sentences you quote. If they are your own, please tell us the context in which you wrote them.

 

[Adrianna95]

Thank you. I keep forgetting about the source.
It is 'English Grammar part 6' Preston Publishing.