Can't is a common spoken form of can 't. Indicating recommendation is a very firm negative guess. For example:
1, can't you control your children?
Cann't control the children?
2. Be reasonable! We can't work late every night.
Be reasonable! We can't work late every night.
I don't see any future in this relationship.
I don't see any future in this relationship.
4. Why do you never understand my point of view?
Why don't you understand my point of view?
Many children can't function effectively in large classes.
Many children can't learn well in large classes.
I can't see you now. Maybe some other time.
I can't see you now. Maybe some other time.
7. They think I can't do it, but I will prove it to them!
They don't think I can do it, but I want them to see it!
Second, never talk to the meaning of bilingual examples.
"Never" means "Never". Often used in spoken form, meaning "forbidden" and "not allowed". For example:
You can't leave the gate open.
You can't leave the door open.
I can't be late, or my father will be angry.
I can't be late, or my father will lose his temper.
We can't let ourselves be overtaken by our competitors.
We can't let our competitors pass us.
We can't let it affect our teaching.
We will never allow it to affect our teaching.
We should not belittle her outstanding achievements.
We must not underestimate her outstanding achievements.