How long - Since when

How long have you known her?

• I’ve known her for 6 years.

• I've known her since 6 years.

How long have María and Juan been married?

• María and Juan have been married since 25 years.

• María and Juan have been married for 25 years.

How long has she been an actress?

• She has been an actress since 1992.

• She has been an actress for 1992.

How long have they lived in Gotham?

• They have lived in Gotham for 20 years.

• They have lived in Gotham since 20 years.

How long have you studied Korean?

• I have studied Korean since 2017.

• I have studied Korean for 2017.

Since when have you been interested in politics?

• I have been interested in politics for two months ago.

• I have been interested in politics since two months ago.

How long have you slept?

• I have slept for five hours

• I have slept since five hours

How long have you had an email account?

• I have had an email account since 2015.

• I have had an email account for 2015.

How long has Ron had his new computer?

• Ron has had his new computer for last week.

• Ron has had his new computer since last week.

How long have you worked in Uber?

• I have worked in Uber for last month.

• I have worked in Uber since last month.