필요�?서식 자료 역시 서식 자료실을 통해�?무료�?내려받을 �?있다�?합니�? If a grammatical basic principle that's additional to 서툴�?is actually a vowel �?and there is no other solution aside from a vowel �?then that grammatical basic principle cannot be included to 서툴�? ☑️ 궁금�?�