It’s sad to ….. / It’s sad that

설명
…하면 슬픈 생각이 든다., …하려니 슬프다. / …해서 슬프다, …인 것을 생각하면 슬프다.

예문
It’s really sad to be alone. (혼자 있으려니 슬프다)

It’s sad to realize that we cannot do anything about it. (그에 대해 아무런 조치를 할 수 없다는 걸 생각하면 슬프다)

It’s sad and unfortunate that these people are insecure or unhappy with their apprearance.

It’s sad that Coach Williams had to lose his job. (윌리엄스 코치가 실직을 하게 되어 마음이 슬프다)

It’s sad to think that I have to leave tomorrow.

It’s sad to say goodbye. (작별인사를 하려니 슬프다)

I think it's sad to see that people sometimes lie in order to get credit for what they've done.