Past Tenses:V2//was/were Ving//had V3// had been Ving. 1.As it ...cold,I went inside to put on my coat.
2.When it ... cold , we returned home after the pleasant journey.
3.Max ... congratulations on his birthday for 3 days.
4.By the time we decided to return home,it ... so cold that we nearly froze to the bone.