A few corrections

Vincent Teo wrote:

Can I say, (a) She was planting an orchid plant in the pot.   (b) She hangs up the clothes on the line.    (c) The Queen is shaking with the pupils.   Grammatically correct - but produces an image of them all standing in a circle shaking. Did you mean to write "The Queen is shaking hands with the pupils"? (d) She is serving food to the customer.  (e) They came early to cheer for the children who were competing  in the race.    You could also say "...to cheer on..." (f) The parents of the athletes clapped loudly.