kalimat bahasa inggris menggunakan kata since

I've studied English since I was child

Maaf kalo salah

since biasanya dipakai dengan present perfect tense/ present perfect continuous...

I have been waiting you since 2 hours ago.
I have lived here since 1998.
It has been long time since we saw each other.
It has been 2 years since we graduated from junior-high.

cmiiw