I can't believe how good be more attractive than I expected
　　I can't leave a project unfinished. I must complete everything I begin.
　　I can't put it down! She's reading sth. interesting.
　　I guess some about as ready as I ever be. She plans to give it today.
　　I had no idea I didn't know
　　I hate to get off on the wrong foot. She doesn't want to make a bad first impression.
　　I have right here What she has with her
　　I lent it to a guest. A visitor has borrowed it.
　　I wouldn't mind doing sth. Doing sth. is all right with me.
　　if ... could ... too ... to ...
　　if I were in your shoes if I were you
　　if only (I wish) ... should/could/would have done
　　if only too ... to ... // not // be tired of
　　I'll burst I've overeaten
　　I'll say. agree
　　illegal against the law
　　I'm about to I plan to do
　　I'm as in the dark as you are. I don't know/understand either.
　　I'm beat. I'm tired. // I'm exhausted.
　　imitation substitute
　　immediately quickly
　　immediately successful a ready market
　　immensely very much
　　important breakthroughs significant research
　　in a little while soon
　    in a minute quickly
　　in advance before hand
　　in any event definitely
　　in every home common household items
　　in good shape new
　　in hand easy access to
　　in less than a week // in three days quickly
　　in my sleep be asleep
　　in no time // in next to no time // any time/minute immediately // quickly // shortly // soon
　　in shape healthy
　　in the dark not understand
　　in the dark not understand
　　in the red // raise one's dues increase the membership fee
　　in time // no way be late
　　in upside down not correctly positioned
　　inconsiderate thoughtless
　　inexpensive affordable
　　inexpensive affordable // availability
　　inquire check for
　　inside out on the wrong way
　　insist on being so independent should get someone to help with
　　instruction direction
　　internship get a good job later
　　interruption bothering
　　interview // resume job
　　introductory course begin to study
　　iron horse train // locomotive // railroad
　　irregular infrequent
　　irrelevant to have little to do with
　　irresponsible isn't careful with
　　isn't warm enough too cold
　　It came in the mail yesterday from my mom and dad. It was a present from his parents.
　　It could be better. It's not very good.
　　It could be worse. It's not too bad.
　　It couldn't be better. It's the best/excellent.
　　It couldn't be worse. It's the worst/too bad.
　　It doesn’t matter. Sb. should not apologize.
　　It is incompressible It can't be compressed
　　It just makes me uncomfortable to ask my friend to wait on me. He doesn't like to bother people.
　　It looks a lot worse that it feels. His eye doesn't hurt very much.
　　It must be clear who's winning by now. The game began some time ago.
　　It only does that when it’s warming up. The noise will be gone soon.
　　it poured // postpone it be canceled because of the weather
　　It remains to be seen wonder
　　It runs well and I've actually grown quite attached to it. He's satisfied with the car.
　　It’s only the first class sb. have missed all term. Missing the class would not harm sb.
　　It's about time ... for quite a while
　　It's easier said than done. It will be difficult for sb. to do sth.
　　It's just overcast. Sb. doesn't need an umbrella.
　　It's my dad's shop. She works there.
　　It's one's fault. Sb. be to blame.
　　It's only been there an hour. It's too soon to go back there.
　　It's only noon. in half a day
　　It's out of the question no be able to do sth.
　　I've been putting it off. He hasn't done any work yet.