Satish wrote:By the way, the pdf you mention, on page 15 talks about another form 'lukien' versus lukiessaan but does not go into much further. Is there any practical difference these two??
They can often be used in almost a similar way, but they’re still different.
Lukien can answer the questions “How?”, “By what means?”, “In which way?”, “In which manner?”, “In which fashion?”.
Lukiessaan doesn’t answer questions of manner but rather temporal questions related to simultaneous actions such as “While doing what?” Also,
lukiessaan is often followed by or related to an explanation of some kind of an interruption that came along.
Maybe the simplest way to exemplify the difference would be as follows:
Poika käveli kadulla kirjaa lukien.
“A boy walked down the street reading a book.”
Poika käveli kadulla kirjaa lukiessaan.
“A boy walked down the street
while reading a book.”
Kirjaa lukien pojalle tuli mieleen uusi ajatus.
“By (the means of) reading the book, the boy got a new idea.” (Reading the book was essential in this process; maybe the content inspired the boy somehow.)
Kirjaa lukiessaan pojalle tuli mieleen uusi ajatus.
“As the boy was reading the book, he got a new idea.” (He got the idea while reading the book... but the book itself, or the action of reading it, might or might not have been related to the formation of this new idea.)