YOU SAID:
Good morning a cup of tea
INTO JAPANESE
おはようございます、お茶を一杯
BACK INTO ENGLISH
good morning have a cup of tea
INTO JAPANESE
おはようございます、お茶を飲みましょう
BACK INTO ENGLISH
good morning let's have some tea
INTO JAPANESE
おはようございます、お茶を飲みましょう
BACK INTO ENGLISH
good morning let's have some tea
That didn't even make that much sense in English.