lie - lay - lain > < lay - laid - lain

ఈ రెండు verbs చాలా confusing గా ఉంటాయి. రెండూ ఒకటే అని కూడా అనుకుంటారు.
  lie = ఉంచు అని అర్థం (అబద్ధం చెప్పడం ఇంకో అర్థం. దీన్ని ఇక్కడ చర్చించడంలేదు)
  Eg. He wants to lie down for a while as he is tired.
  Eg. Indian cricket team's strength lies in Kohli's batting and Bumrah's bowling.
  lay అనేది lieకు past tense.
  Eg. The injured soldier lay on the ground in the battle field.
  lain అనేది ie కు participle.
  Eg. They have lain their lives for the country.
  Eg. A huge lottery prize money is lain unclaimed for more than two months.
 
lay – laid- lain
  lay means to keep.
  Eg. Our hen always lays eggs in our neighbour's yard.
  laid past tense of lay.
 Eg. The mother laid a blanket on the cot for the kids.
  lain past participle of lay.
  Eg. Arjuna had lain down his bow and arrows just before the great war began.
 
 Try to do this! Which is CORRECT?
 1. I am not well and need to lay/lie down for a while.
 2. After a long bicycle ride, I lay/laid down.
 3. My brother lays/liesflooring tiles for a living.
 4. The parcel has been laying/lying there for 10 days.
 5. We need to lay/lie this baby down for a nap.
 6. The lions are laying/lying in wait for their prey.
 7. The tigers have lain/laid in wait for their prey.
 8. I laid/lay the bed sheet over my daughter as she slept.
 9. I will lie/lay my head on my pillow shortly.
 10. Pak soldiers laid/lied down their arms in Dhaka, surrendering East Pakistan.

 KEY
  1) lie  2) laid  3) lays 4) lying  5) lay  6) lying  7) lain  8) lay  9) lay 10) laid