Relative clauses
Defining or non-defining: one comma changes the meaning of the whole sentence, and it is the distinction almost nobody punctuates correctly.
The same topic at other levels
Level Γ1 is part of the subscription
All A1 grammar is free, forever. From A2 up, the complete notes — explanations, tables and exercises — are included in the subscription, from 8 CHF a month.
See plansStart with A1 grammar, free →