Он [Каренин] видел, что она вела се

Он [Каренин] видел, что она вела себя неприлично (unbecomingly), и считал своим долгом сказать ей это. Но ему очень трудно было не сказать более, а сказать только это.

Results (English) 1:

He [Karenin] saw that she behaved indecently (unbecomingly), and considered it his duty to tell her this. But it is very difficult to say more, and say just that.

Results (English) 2:

He [Karenin] saw that she was behaving indecently (unbecomingly), and considered it his duty to tell her that. But it was very difficult to say the least, and say just that.

Results (English) 3:

He [Каренин] saw that she had fought the rawness (unbeсоmingly), and felt obliged to say it. But it is very difficult it was not to say more, and say only that.