Question

20 Explanation 4 Fill in the blanke with the careers from of tense (knows that for years (Present Perfect et tenbbnbnse) 10 over​

Answer 1

Answer:

Using the present perfect, we can define a period of time before now by considering its duration, with for + a period of time, or by considering its starting point, with since + a point in time. FOR and SINCE can also both be used with the past perfect. SINCE can only be used with perfect tenses. FOR can also be used with the simple past.

For + a period of time

for six years, for a week, for a month, for hours, for two hours

I have worked here for five years.

Since + a point in time

since this morning, since last week, since yesterday

since I was a child, since Wednesday, since 2 o'clock

I have worked here since 1990.