1 to be writing / to have been writing 2 to find out - to see 3 to be operated 4 to be made 5 to have placed 6 to have been working 7 to be seen
1 to be writing / to have been writing 2 to find out - to see 3 to be operated 4 to be made 5 to have placed 6 to have been working 7 to be seen