My brother … in lagos for the past ten years.

Step 1: Analyze the question The sentence is "My brother __ in Lagos for the past ten years." We need the verb form that fits correctly.

Step 2: Identify the key clue The phrase "for the past ten years" shows an action that started in the past and is still continuing up to now. This calls for the present perfect continuous tense (or present perfect).

Step 3: Explain the concept

• Structure: has/have + been + verb-ing
• Use: for actions that began in the past and continue to the present, usually with for (duration) or since (starting point).
• Examples: "She has been teaching for five years." "They have been waiting since morning."

Step 4: Test each option

• A. is living: present continuous. It does not fit "for the past ten years", which needs a perfect form.
• B. lived: simple past. It describes a finished action, so it clashes with "the past ten years" leading up to now.
• C. will lived: grammatically wrong, because "will" must be followed by the base verb (will live), not the past form.
• D. has been living: present perfect continuous. "My brother" is third person singular, so has is correct. It fits the duration expression perfectly.

Step 5: Answer The correct sentence is: My brother has been living in Lagos for the past ten years.

Exam tip: When you see "for the past...", "for + a period of time", or "since...", think present perfect (has/have lived) or present perfect continuous (has/have been living). Also remember that will is never followed by a past-tense verb.