How do you use squalid?

Harry was shocked to see the squalid conditions in which some people had to live when visiting a large developing world city.

The squalid house was crawling with spiders and cockroaches.

A drawbridge allows welcome guests into a castle to cross the moat(a trench of water that goes around the perimiter of the castle)

You use "in" when you mean "in" and you use "or" when you need to use "or". It is rather difficult to construct rules for the use of prepositions in most languages.The grammatical structure of the...

Using " Has " is referred a past tense. Such as: He has taken the garbage out already. Using " Is " for example is referred a Present tense. Such as: He is taking out the garbage.