1) Count (simple)     - The survevor count a building (present tense)     - The survevor counted a building ( Past Tense)     - The survevor will count a building (Future Tense)     - The survevor would count a building ( Past Future Tense)

2) Observe ( Continuous)     - The supervisor is observing a dams      - The supervisor was observing a dams     - The supervisor will be observing a dams      - The supervisor would be observing a dams 

3) Saw (Perfect)     - Builder has sawed a wood     - Builder has saw a wood     - The builder will have saw a wood     - The builder would have saw a wood

4) Operate (Perfect Continuous)     - The foreman has been operating a truck     - The foreman had been operating a truck     - The foreman will have been operating a truck     - The foreman would have been operating a truck