Position of adverbs of time / frequency

Adverbs of frequency

Always, usually, regularly, normally, often, sometimes, occasionally, rarely, seldom, never are adverbs of frequency.

The position of these adverbs is:

a) before the main verb (precede al verbo más importante de la oración, no al auxiliar)

		Adverb of frequency	Main Verb
I		always	get up	at 6.45.
Peter	can	usually	play	football on Sundays.
Mandy	has	sometimes	got	lots of homework.

b) after a form of to be am, are, is (was, were) (después del verbo ser/estar)

	Verb	Adverb of frequency
Susan	is	never	late.

c) The adverbs often, usually, sometimes and occasionally can go at the beginning of a sentence. (estos adverbios pueden ir a comienzo de la oración)

Sometimes I go swimming.
Often we surf the internet.
Sometimes I read in bed.

d) Sometimes these adverbs are also put at the end of the sentence. (estos adverbios a veces también van al final de la oración)
We read books occasionally.
I eat chocolate sometimes.

Now do these two exercises in the following page:
http://www.englisch-hilfen.de/en/exercises/adjectives_adverbs/adverbs_of_frequency.htm
http://www.englisch-hilfen.de/en/exercises/adjectives_adverbs/adverbs_of_frequency1.htm