They have been learning English _____ the past six years.
Afrom
Bfor
Csince
Dthrough
Answer:
B. for
Read Explanation:
ഇവിടെ ഉപയോഗിക്കേണ്ട tense 'Present perfect continuous' ആണ്. കാരണം 'Present perfect continuous' ന്റെ time words ആണ് 'since' ഉം 'for' ഉം. Present perfect continuous ന്റെ format : subject + has/have + been + ing form + RPS( Remaining part of the sentence.) They + have ( Subject They വന്നാൽ have ആണ് auxiliary verb ഉപയോഗിക്കേണ്ടത്.) + been + learning english + for the past six years.
We use "for" to indicate a period of time (e.g., six years, two hours, etc.).
"Since" is used to refer to a specific point in time (e.g., since 2019, since Monday).