Hi
Hello
good morning
good afternoon
good evening
good night
good bye / so long
good luck
how do you do
how are you
nice / glad to see you
pleased to meet you
see you later / again
thank you
you're welcome
not at all. / never mind
it's my pleasure
excuse me
i am sorry
that's ok / all right
please be quiet
let's go
do you understand
i don't understand
are you ready
what's happening
please help me
yer of course
please repeat it again