It could be quickly or maybe rapidly. But it just depends which one you like.
"Fastly" is not a word. However, "quickly" is a word which you can use. The words "speedily" and "hurriedly" would also work.
Even though fastly is not a real word, there are two syllables in "fastly". "Fast-ly"However, quickly is a better adverb just to let you know. It also has two syllables. "Quick-ly"
by swimming fastly
fastly
fastly.
no
move your moo fastly back and fastly forward then let it roll
fastly
Yes, but not for fast referring to speed.The adverb fastly is an alternate form of the adverb "fast" meaning securely or tightly (tied or bound).
No fastly is not a word. Fast is an adverb so you can say: He ran fast.
Other words that describe excellence include mastery, distinction, superiority, and perfection.
"Fastly" is not a word. The appropriate word to use in place would be quickly."She is doing it quickly" or "She is doing it fast" are both acceptable.