Thank you for your corrections! Here are some other sentences on the same theme.

1)In chapter 5 Frankenstein is describedasa monster with thin, black lips, dull (and) watery eyes and a sallow skin which contrast with its pearly white teeth and shiny, black hair.
2) The first gothic feature is the presence of grotesque elements, which are evident (?) in the description of the monster. There is also the desolate environment. Victor starts (started?) and ends his adventure in the Arctic ice.
3) Dr Frankenstein is plagued by a terrifying dream.
4) During a dreary night Dr. Frankenstein sees that the dull yellow eyes of his creature are (not were) open.
5) For the creation of the monster the doctor chose beautiful parts from dead corpses but the finished man is horrible.
6)He has a sallow skin and we can see (??) the pulsing work (better: the pulse) of his arteries and veins.
7)This characteristic is in contrast (better:contrasts) with his shiny hair and pearly white teeth.The doctor is so horrified by the monster that he cannot sleep.

2 answers

1) In chapter ,5 Frankenstein is described as a monster with thin, black lips, sallow skin, and dull watery eyes, all of which is in contrast with his pearly white teeth and shiny, black hair.

2) The first gothic feature is the presence of grotesque elements, which are evident in the description of the monster. There is also the desolate environment. Victor starts and ends his adventure in the Arctic ice.

3) Dr. Frankenstein is plagued by a terrifying dream.

4) During a dreary night, Dr. Frankenstein sees that the dull yellow eyes of his creature are open.

5) For the creation of the monster, the doctor chose beautiful parts from dead corpses, but the finished man is horrible.

6) He has sallow skin, and we can see the pulsing of his arteries and veins.

7) This characteristic contrasts with his shiny hair and pearly white teeth. The doctor is so horrified by the monster that he cannot sleep.

Read and compare carefully for spaces, commas, verb tenses, etc.
Sorry!! This is how the first of my post above should read --

1) In chapter 5, Frankenstein ...