1. Shine a light on/at/in the back of the sheet.
2. Shine a light in back of the sheet.
(Which prepositions do we have to use?)
3. Play music for me.
4. I want you to play music with the guitar.
5. I want you to play the CD and make me hear the music from the CD.
(What does #3 mean, #4 or #5?)
#1 -- Either "on" or "at" but not "in."
#5 -- Stop the sentence after the first instance of "CD."
#3 and #4 mean that the speaker is asking someone else to play a musical instrument (a guitar, in #4, but any musical instrument in #3). #5 means the speaker is asking for music from a CD in a car or sound system in a house.
1. To properly express the action of shining a light on the back of the sheet, the preposition "on" is typically used. So, the correct phrase would be "Shine a light on the back of the sheet."
2. In the second sentence, the preposition "in" is used incorrectly. The correct phrase should be "Shine a light behind the sheet." This conveys the idea that you want to shine a light from behind the sheet, illuminating it.
Regarding the other questions:
3. The phrase "Play music for me" typically means that you are asking someone to perform or provide music in your presence, for your enjoyment or entertainment. This could include someone playing an instrument, singing, or even playing recorded music.
4. In the fourth sentence, you are stating your desire for someone to play music using a specific instrument, which is the guitar. So, "I want you to play music with the guitar" specifies that you want them to use the guitar as they play music.
5. In the fifth sentence, you are expressing the desire for someone to play a CD and make you hear the music from it. This could mean playing the CD on a stereo system, computer, or any other device that can reproduce audio. The phrase "make me hear the music from the CD" indicates that you want the music to be played audibly for your listening pleasure.