... on, and it might leak all over the place. sign in sign in & signs in signing in signed in signed in 1. sign in p.v. When you sign in, you write your name on a list to show that you ... drop-off n. A decline in a business's sales, in the occurrence of an event, or in the interest some people have in something, is a drop-off. There has been a drop-off in traffic deaths ... perfect phrasal verbs The past perfect is used to say that one thing in the past happened before another thing in the past: Mike said the wedding had fallen through. past earlier in the...