To acquire some knowledge of grammar is absolutely necessary.
=It is absolutely necessary to acquire some knowledge of grammar.´Ù¼ÒÀÇ ¹®¹ýÀûÀÎ Áö½ÄÀ» ½ÀµæÇÏ´Â °ÍÀº ÇʼöÀûÀÌ´Ù.
To point at people is impolite.
=It is impolite to point at people. ³²¿¡°Ô ¼Õ°¡¶ôÁú ÇÏ´Â °ÍÀº ½Ç·ÊÀÌ´Ù.
2. »ç¹°ÀÌ ÁÖ¾îÀÎ ±¸¹®
»ç¶÷ÁÖ¾î + can(=be able to) + µ¿»ç¿øÇü¢¦
=»ç¹°ÁÖ¾î + enable + ¸ñÀû¾î + to + µ¿»ç¿øÇü¢¦
As I am ill, I cannot attend the meeting.
=Because of my illness, I cannot attend the meeting.
=My illness prevents me from attending the meeting.
=My illness forbids me to attend the meeting. ¾ÆÇÁ±â ¶§¹®¿¡ ³ª´Â ȸÀÇ¿¡ Âü¼®ÇÒ ¼ö ¾ø´Ù.
He had to put off his departure because of the rain.
=The rain forced(=compelled, obliged) him to put off his departure. ±×´Â ºñ ¶§¹®¿¡ Ãâ¹ßÀ» ¿¬±âÇØ¾ß¸¸ Çß´Ù.