“I can not attend.”
Grammar Entry 621 / 1011 60-second read
Cannot vs. Can not
One word is standard.
The comparisoni
“I cannot attend.”
The ruleii
¶
One word by default.
CANNOT is the standard spelling. CAN NOT is used only when emphasizing "not" separately, e.g., "I can, not must, attend."
Memory aidiii
Remember it like this
Default = one word.