Put an apostrophe after the stressed syllable.
for mal ly

I have no idea how I'm supposed to know where the stress is

The place where the apostrophe should be put is form 'ally.

Explanation:

All English words have syllables. An easy way to understand a syllable is, when you say words aloud clap your hands . One clap words have one syllable and they are not stressed out.

For example: Words like walk, talk, bought, bat e t c are said easily and have one clap.

But  words like happy, angry, pretty, ugly e t c, when they are spoken aloud,  require two claps, as these words are stressed and broken into two syllables.

Similarly for the word formally, it requires two claps when you speak the word out . This shows that there are two syllables in the word formally.

coin toss of the tosses to the toss

a complex sentence consists of an independent clause and one or more dependent clauses.  

to write complex sentences, we must use subordinating conjunctions.  

all the complex sentences begin with a subordinating conjunction and when it occurs, a comma must be place at the end of the dependent clause. on the contrary, if the sentence begins with an independent clause, then no comma is used.

after  

although  

as  

because  

before  

if  

since  

when  

for example,  

after she won the competition, she became very popular.  

although my father was hurt, he continued fighting for his rights.  

as all of you got a ten, you will be able to leave early today.  

before he went to the war, he asked his parents to bless him.  

if it is cold, i won’t go out.  

since you didn’t bring the homework, you will get low grades.  

when it is hot in the town, everyone goes to the beach.