Depending upon the situation and tone of voice used, this phrase can be either sincere or sarcastic.
"You have the winning ticket! Lucky you!" (sincere)
"It's your turn to clean all the bedpans. Lucky you." (sarcastic)
When you invite someone to "come over," it usually means you're inviting them to your home or to the place where you're staying. If you simply said "Why don't you come for lunch?", that could mean that you're going out to a restaraunt for lunch, and you're inviting the person to accompany you.
To eavesdrop, or overhear. To listen to someone else's conversation.
TV Commentator: "We will now listen in as the Prime Minister addresses his advisors."
4.turn left on shiki street or turn left into shiki street?
Depends upon your location. In the US, we say "turn left on" or "on to" whatever street when giving directions.
5.that sounds like fun.(why don't we say that sounds funny?)
There's a difference between "fun" and "funny." Funny indicates something humorous, something that is designed to make you laugh. Fun means something enjoyable, something designed to relax and entertain you.
"Would you like to go to Disney World with me this summer?"
"Oh, yes! That sounds like fun!"
Student or Learner