Since-For-Ago
I. Since-For-Ago
A. Ago (Il y’a)
Ago is used to express a finished action in the past and it is used with $\textbf{the simple past tense.}$
\textbf{NB:} Ago \textbf{always} comes at the \textbf{end of the sentence.}
Eg:
- I saw him three years ago.
- He ate cookies two days ago.
B. For(depuis)
\textbf{For} expresses the duration , the length of an action. Contrarily to ago, it is used with the present perfect, the past perfect, the present perfect continuous and the past perfect continous.
Ex :
- He has listened to reggae music for two hours.
- I have been teaching English for ten years .
- We have done this exercise for two hours.
C. Since(depuis)
\textbf{Since} expresses the beginning of an action. It is usually precised and it is used with the present perfect or the present perfect continuous.
Ex :
- I have lived here \textbf{since} October 2014
- She has been washing dishes \textbf{since} her chilhood.
Some expressions are sometimes used with \textbf{since:}
\textbf{since} their wedding, \textbf{since} the biginning of the year, \textbf{since} his/her childhood etc.