1. The castle was built over one hundred years ago

2. How long did he walk before going to bed?

VI.

1. Because George is poor , he cannot ____

2. It was such heavy suitcase that Jack cannot carry.

3. Althoufh he had worked for a long time , he did not feel tired 

4. Samantha wishes she had not stepped on broken glass

V.

1.The castle was built over one hundred ago.(ago->QKD,passive voice)

2.How long did he walk before going to bed?(before+V-ing)

VI.

1.Because Geogre is poor,he cannot enter a grammar school.

2.It was such a heavy suitcase for Jack to carry.(It+to be+such+a/an+adj+n+for+sb+to V)

3.Although he had worked for a long time,he did not feel tired.

4.Samantha wishes she hadn't stepped on broken glass.