1, "I need the pencil which color is black" -> "I need the pencil which is black" or "I need the black pencil."
2, "This is the man whose my sister talked to last night" -> "This is the man whom my sister talked to last night."
3, "They let their garden used by him" -> "They let him use their garden."
4, "The pen used to bought yesterday" -> "The pen was bought yesterday."
5, "Did she have your sister to cook dinner?" -> "Did she have your sister cook dinner?" or "Did she get your sister to cook dinner?"
6, "Did you have your car to repaired?" -> "Did you have your car repaired?" or "Did you get your car repaired?"
7, "He was seen to cooking breakfast by me" -> "I saw him cooking breakfast."
8, "Has she seen to write a letter?" -> "Has she been seen writing a letter?"
9, "They are enough strong to lift that case" -> "They are strong enough to lift that case."
10, "Writing to out close friends are very interesting" -> "Writing to our close friends is very interesting."