In the story The cask of Amontillado what makes the story suspenseful?

Poe is able to create suspense throughout the whole story by talking about the tunnels and how damp and dark they are and the presence of death. The way he writes this story shows dark imagery. You can imagine Montresor taking Fortunato into the tunnels and how dark it is

i believe it is "he will always remain extremely timid" if its wrong sorry

the present continuous is a verb tense which is mainly used to indicates that an action is in progress at the moment of speaking.  

it is formed using: person + verb to be (am/is/are) +verb + - ing form  

example: i am studying at this moment .

in addition, the present continuous is also used in order to express things that will or will not happen in the near future.

example: i am having dinner with some friends tonight.

the speaker sometimes   uses it   to express that an action is repeated and it causes irritation on the part of the speaker

example: my sister is constantly complaining about everything.