Murder is illegal.
Stealing is illegal.
Illegible means that something which is difficule to read. So the sentence will be "His handwriting is illegible as I can't read what he is trying to say."
Example: "I ban all toys from this kingdom!" Ban means to make something illegal, so use your imagination!
It is illegal to implode on someone's house.
Euthanasia is illegal in the United States.
The expulsion of illegal immigrants from Arizona is controversial.
His type of driving was legal. How could you use legal in a sentence? It is illegal to poison ill eagles.
Yes, it is highly illegal. You may be prisoned for 20 years if you mention the word "Christmas" and possible life time sentence if you use the word "god". So, be aware and never ever use those words.
They invent illegal modes of expenditure; and what do they or their wives care about the law?
Yes. It is against the law you will be arrested and prosescuted. Maximum sentence life in jail. So dont do it if you do its sooo badass.
Sure, I can use "so" at the beginning of a sentence.
He's in prison for selling heroin other illegal substances.