E Completed actions over a period of time

for and since

To ask questions about periods of time, we can use How long...? + the present perfect:

How long have you been in England? I have been here since August/for six months.

common mistakes: We do not use the present simple tense with forand sinceto talk about something that began in the past and has gone on up to the present:

wrong: I am here since December.

right: I have been here sinceDecember.

D Negatives

We can use the present perfect negative to talk about the amount of time that has passed between now and the last time something happened:

We haven't hadany large orders from them forseveral months.

I'm not sure if his trip is going well. Ihaven't heardfrom him sinceMonday.

E Completed actions over a period of time

If we talk about a completed action, (particularly if we give details about how much, how many, etc.), we can use the present perfect and since (but not for).

We can also use other phrases of duration such as to date, recently, over the past five years, etc. The action itself is finished, but the period of time extends up to the present:

Wehave openedsix new branches since July. (From July until now.)

Exercise 1

For and since with stative verbs

Познавательные статьи:



Алгоритмические операторы Matlab

Конструирование и порядок расчёта дорожной одежды

Исследования учёных: почему помогают молитвы?

Почему терпят неудачу многие предприниматели?