11

 El mismo mar de todos los veranos

El amor es un juego solitario

Varada tras el último naufragio 

The titles of these three novels are in the 11-syllable line.  The backbone of the meter is the strong accent on syllable six. 

 El mismo mar de TOdos los veranos

El amor es un JUEgo solitario

Varada tras el ÚLtimo naufragio 

That's what makes the line a meter, not must a random number of syllables.  You could say the line is more constrained at the cadence 

de todos los veranos

un juego solitario

el último naufragio 

These are 7 syllable lines.  So the first four syllables are free. The iambic pattern is fine: 

El mismo mar

But the first or third syllable can be accented: "El amor"

The English pentamer feels different, because syllables are more weighted, and average word length shorter.  You are going to find a lot of 8-9 word lines, and some lines of 10 words:

A little touch of Harry in the night

To be or not to be, that is the question 

The country cocks do crow, the clocks do toll

Never again would the bird's song be the same

I have been one acquainted with the night 

I was thinking there are two way of approaching it. There are individual lines that are just self-contained and great examples, but the real achievement is the paragraph of several lines in a row, where each line is still a great example on its own, but the effect is of the sequence of metrical phrases, some crossing the line.  My daughter was explaining to me that the secret of good trumpet playing is to have a continuous flow of air between the notes. The beginning student will play each    note    by    its     self, and have difficulty with legato. 

There is almost a Charlie Parker quality to passages of great rhythmic stretchiness:

Now entertain conjecture of a time

When creeping murmur and the pouring dark

Fills the wide vessel of the universe.

From camp to camp through the foul womb of night.

The hum of either army stilly sounds...  

No two lines are alike.