When I think of basics of any language I think things like “can” or “if”. They are really basic stuff so after getting almost end of N5 I started wondering why I haven’t got those lessons yet. Then I searched them and it seems they are both in N4. I couldn’t find “can’t” but there is a lesson about “unable to” in N2. Meanwhile N5 has lessons like “to become” which I think is far less common.
I feel like you use “if” much more than “to become” in any language so I wonder, should I go and learn stuff even it’s in N3 for example when I’m still on N5? Or is there a logic behind this? Maybe “can” or “if” is hard and “unable to” is even harder that’s why we need to mostly follow N levels?
Sometimes I try to form simple sentences but I have missing knowledge, should I go learn them when I want or maybe I really should follow N levels? What do you guys do/think?