—We didn't find the Blacks ________ the lecture.—No one had told him about ________ a lecture the following day.
If I with her last summer, I with her now.
--- Where have you been?--- I got caught in traffic; I could have been here a little earlier.
If it yesterday, we could play football on the sports ground now.
--- Would you have called her up had it been possible?--- Yes, but I busy doing my homework
Jane would never have gone to the party that Mary would come to see her.