필요�?서식 자료 역시 서식 자료실을 통해�?무료�?내려받을 �?있다�?합니�? If a grammatical basic principle that's included to 서툴�?is really a vowel �?and there's no other choice aside from a vowel �?then that grammatical theory can't be additional to 서툴�? Any grammatical basic principle i