Usages of verlengen
Ik verleng het lidmaatschap online, zodat ik korting krijg.
I renew the membership online so that I get a discount.
Ik moet mijn paspoort verlengen omdat ik overmorgen op reis ga.
I have to renew my passport because I am going on a trip the day after tomorrow.
Elon.io is an online learning platform
We have an entire course teaching Dutch grammar and vocabulary.