Question

Select suitable option to complete the sentence:
Physics ______ my best subject at school but when I _____ (start) college, my grades in physics _____ (come) down.

• A. is ; starts ; comes
  
• B. was ; started ; came
  
• C. are; start ; come
  
• D. were ; started ; came
  

Answer 1

The correct option is B was ; started ; came

Option B: 'Physics' is an uncountable noun that refers to a science that deals with matter and motion. It's in plural form because of the letter 's' but the noun is singular.

When the subject (Physics) is singular, the verb that follows must also be singular. This is called the subject-verb agreement.

'Was' is a singular noun. Also, it's a simple past tense verb that refers to a past action.

'Started' and 'came' are also past tense verbs that refer to actions that happened in the past. As the words suggest, the grades at school and college are mentioned. That means that the actions have already happened (past tense).

They're the most suitable verb forms from the given options. Hence B is correct.

Options A, C and D:

'Is' is a simple present tense verb whereas the sentence is in the past.

'Are' and 'were' are both plural forms of 'is' and 'was', respectively. They do not agree with the singular subject 'Physics'.

'Starts' and 'comes' are simple present tense verbs.

'Start' and 'come' are base verbs that do not express tense or time.

These verb forms do not form a complete sentence.

Hence A, C and D are wrong.