Class 9 Grammar: Since and For

Use of ‘since’ and ‘for’

1.    Ajay has worked in TATA motors for nine years.

2.    Ajay has been working in TATA motors since past nine years.

In sentence 1, the word ‘for’ is used to measure the period of time. Here, the action is started and completed in the past.

In sentence 2, the word ‘since’ is used to show that the action is/was started in the past but is/was not ended.

This rule is applicable only in Present perfect or past perfect or future perfect tense. We cannot use this rule in simple present, simple past or simple future tense.