You have to know the letter strings to know where they are, for example, in the word "doubt" , the b is silent. Without knowing this , you would say "dowbet". Many words have silent letters including:
Juice ( i )
Scissors ( c )
Encyclopaedia ( a )
Dinosaur ( u )
Except... the "c" in "scissors" isn't silent; it has the "s" sound, since it's followed by an "i" (a following "e" works the same; a "g" sounds like a "j" in similar circumstances). Also, the "u" in "dinosaur" is not silent; it modifies the sound of the "a" to sound (almost, for some accents) like "die-no-sore."
However, "debt" and "lamb" both have silent "b"s.
In the words provided, the silent letters are as follows: In "Week," there are no silent letters. In "Won," the letter "W" is silent. In "Flower," there are no silent letters. In "Blew," there are no silent letters, and in "Dew," again, there are no silent letters.
The silent letter in the word "wrote" is the silent W.
The word "queue" has the most silent letters, with all four of its letters being silent.
The letters b and e are silent in subtle.
The silent letters in the word "throat" are the 'h' and the 'a'.
There are no silent letters, all letters are sounded.
In the word "depot," the letters "e" and "t" are silent.
The silent letters in "foe" are the "e" at the end of the word.
The silent letters in the word "right" are the 'gh.'
The letters "h" and "o" are silent in the name Christopher.
The 'w' is silent.
The letters "l" and "d" are silent in the word "could".