The workers were working on the building. What is the correct tense in this sentence?

এই টপিকের আরও কিছু প্রশ্ন:

• The verb of the word 'habit' is-
• Choose the correct sentence
• The word 'right' has been used as a verb which of the following sentence?
• This is the school which ___.
• ‘Able’ শব্দটির Verb নিচের কোনটি?