Sorry, it’s being a while since the last lesson as I was busy helping my wife taking care of my twin babies.
Today, I will cover “~ku narimasu” which means “become something”.
Enpitsu ga nagai desu + Mijikaku shimasu = Mijikaku narimashita
Long pencil + Shorten it = Became Shorter
For adjective ends with “i”, “ku narimasu” should be used otherwise “ni narimasu” shall be used. For example :
Byōki >> Genki = Genki ni narimashita
Sick >> Fine / Well = Became well
Fuyu >> Haru = Haru ni narimashita
Winter >> Spring = Became (Changed) to Spring
I have already became 20 years old – Mō 20 sai ni narimashita
Still haven’t reach 20 years old – Mada 20 sai ni wa narimasen
As usual, for negative answer “ni wa” should be used instead of “ni”. For the ~ku narimasu, ~ku arimasen shall be used.