Question

insert the correct preposition in each of the following sentences.She has been ill _______ last month.(since, for)

Answer 1

answer

for last month .

Answer 2

She has been ill since last month

• The preposition since requires a definite starting time of an event.
• For example - I haven't seen Tom since last year,  it has been raining since 11am;
• Whereas, the preposition for is used with time, and requires a time length.
• For example - I haven’t seen Tom for a year; it has been raining for four hours
• Thus, the correct sentence is - She has been ill since last month