Apa perbedaan penggunaan 'for' dan 'since' serta bagaimana contoh kalimatnya?

For jika diikuti proper noun (nama/kata ganti orang dan benda) akan memiliki arti untuk.

Contoh:

• I bought these flowers for her.

For jika diikuti suatu periode waktu (jumlah waktu) akan memiliki arti selama.

Contoh:

• I have been teaching in STKIP Sembrani for ten years.
• Ratu was going away for a week in July.
• Dodo has been suffering from running ear for fifteen years.

Since sebagai preposisi memiliki arti sejak. Preposisi ini harus diikuti nama waktu atau keterangan waktu—bukan jumlah/periode waktu seperti for.

Contoh:

• I have been teaching in STKIP Sembrani since ten years ago.
• Ratu was going away since last week in July.
• Dodo has been suffering from running ear since he was born.