Slown down: slow sb/st down

> Let's read carefully the sentences before we studying this new phrasal.

* Waldo realized he was driving too fast and began to slow down.
* They claim they can slow down the ageing process.
* Can't you work any faster? You're slowing the whole class down!
* Don't wait for me - I'm only slowing you down.
* The plant's growth is slowed down by lack of light.

......................................................................

> Let me see if you found out the meaning of slow down. Could you please tell me the opposite of it? I will give you four options but only one is the correct. here you are:

a) go quickly
b) go more quickly
c) go slowly
d) go more slowly

......................................................................

> Congratulations for your effort in studying English. Now I want you to help me to identify which of these sentences are gramatically correct.

a) He slowed down
b) He slowed the car down
c) He slowed down the car
d) He slowed it down
e) He slowed down it
f) The car was slowed down

......................................................................