EF3/4 Sentence fragments

sentence fragments
frag- not a whole sentence

Because it is cold today. frag

She is wearing a warm sweater. Because it is cold today. frag

She is wearing a warm sweater because it is cold today.

Doing exercise every day for 20 minutes. frag

S + V

I do exercise every day for 20 minutes.
I am doing exercise every day for 20 minutes.
I like doing exercise every day for 20 minutes.
I want to do exercise every day for 20 minutes.

Doing exercise every day for 20 minutes is good for you. Doing (noun) gerund