As soon as I have done my homework, I will go for a walk.

[Nonverbis]

Future and participles substituting finate verb forms

Examples from a textbook Grammar by Golitsinsky (ISBN 978-5-9925-0587-0).

1. Could you tell me whether Perfect Participle Active can refer to the future?

In other words do these examples convey the same information?

As soon as I have done my homework, I will go for a walk.
Having done my homework, I will go for a walk.

As soon as I have bought the book, I will begin reading it.
Having bought the book, I will begin reading it.

2. What about Present Participle Active? Is such substitution possible?

As soon as I have done my homework, I will go for a walk.
Doing my homework, I will go for a walk.

As soon as I have bought the book, I will begin reading it.
Buying the book, I will begin reading it.

 

[5jj]

As soon as I have done my homework, I will go for a walk.
Doing my homework, I will go for a walk.

As soon as I have bought the book, I will begin reading it.
Buying the book, I will begin reading it.

The second sentence in each pair does not work at all.

 

[jutfrank]

Could you tell me whether Perfect Participle Active can refer to the future?

In other words do these examples convey the same information?

As soon as I have done my homework, I will go for a walk.
Having done my homework, I will go for a walk.

As soon as I have bought the book, I will begin reading it.
Having bought the book, I will begin reading it.

No, on the contrary. The second sentence in each pair would most likely mean that the speaker has already done his homework and bought the book at the time of speaking. In the original sentences, it's the as soon as + present tense that gives the future meaning.

2. What about Present Participle Active? Is such substitution possible?

As soon as I have done my homework, I will go for a walk.
Doing my homework, I will go for a walk.

As soon as I have bought the book, I will begin reading it.
Buing the book, I will begin reading it.

No not at all. I'd say that the closest the second sentence in the first pair could get to having any meaning is that the actions expressed in each clause co-occur. That is, you will go for a walk while doing your homework. The second sentence of the second pair has no meaning at all.

 

[Nonverbis]

As soon as I have bought the book, I will begin reading it.
The book bought, I will begin reading it.


Could you tell me whether these sentences means absolutely the same or I have distorted the meaning?

 

[5jj]

The second, which is pretty unnatural, probably means the same as Having bought the book at some time before now) I will begin reading it.