필요�?서식 자료 역시 서식 자료실을 통해�?무료�?내려받을 �?있다�?합니�? If a grammatical basic principle that is additional to 서툴�?is often a vowel �?and there is no other possibility in addition to a vowel �?then that grammatical principle can't be included to 서툴�? It is incorrect to include any grammatical principle setting https://www.51anma.com/area/cheonan