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Word placement - Post-positions in Hindi

I am trying to learn how to work with post-positions like 'Before' , 'After', 'Behind' and 'In Front'.

I tried using what I know about word placement to make some sample sentences. I don't know if these are correct but they are my best guess at the moment.

#1. Mein dopahar ke do baje se pahle ka karti hoon. (I eat before 2pm)
#2. Mein dopahar ka khana ke baad kam karti hoon. (I work after lunch)
#3. Gari ghar se peeche hai. (The car is behind the house.)
#4. Admi dukan ke samne hai. (The man is in front of the shop.)

Any input would be greatly appreciated!

Dhanyavad!