Grammar on this paper is the form that fits the sentence in your language. The name of an English rule is not the answer.
The idea
The objective paper tests lexis and structure: the word that fits, the form of the verb, agreement, and the order of the sentence. The questions are in the language of your entry. Choose the form a speaker of that language would use in that sentence. Asante Twi, Akuapem Twi and Fante do not share every form. An Ewe sentence is not repaired by a Ga word. A Dangme form is not a Ga form. Learn the items inside sentences, not as a list of English terms.
A written answer that asks you to correct a sentence should give the corrected sentence, not only the name of the fault. If it asks for the meaning of a word, give the meaning in the way the question asks, and keep it short. A proverb or a long story is a different part of the paper. Show the form, then stop. Guessing a form from English word order is a common way to miss the item, because the order in your language may not follow English.
The BECE Ghanaian Language tips guide sets out comprehension, composition, grammar, literature, culture and translation. At WASSCE you sit the language on your entry, including Akan, Ewe, Ga and the others. Start practising on glearn.now with Kevin and Anna. BECE Ghanaian Language tips