필요�?서식 자료 역시 서식 자료실을 통해�?무료�?내려받을 �?있다�?합니�? If a grammatical basic principle that is definitely added to 서툴�?can be a vowel �?and there's no other option other than a vowel �?then that grammatical theory can't be added to 서툴�? 저작자 명시 필수 영리�