In English, we use the phrase “used to” to indicate repetitive events in the past.
e.g. I used to go to morning walk when I was in school.
He used to play bad before he got the coaching.

Sentence structure in Gujarati is :-
Subject        verb+suffix        form of verb હોવું(hovuM)

Suffix depends on gender rather than the person (first, second or third)
Refer suffixes mentioned in the lesson
Negative Sentence in Simple Present tense in Gujarati

For Form of હોવું(hovuM) refer
Simple Past Tense of “To Be” in Gujarati

Using this information sentences can be formed as follows:-

I(boy) used to do:- હું કરતો હતો (huM karato hato)
She used to speak:- એ બોલતી હતી (e bolatI hatI)
He used to dance:- એ નાચતો હતો (e nAchato hato)
He used to eat mangoes:- એ કેરીઓ ખાતો હતો (te kerIo khAto hato )
They(plural of he) used to eat mangoes:- તેઓ કેરીઓ ખાતા હતા (teo kerIo khAtA hatA)
They(plural of she) used to eat mangoes:- તેઓ કેરીઓ ખાતી હતી (teo kerIo khAtI hatI )
She(polite) used to play cricket:- તેઓ ક્રિકેટ રમતાં હતાં (teo krikeT ramatAM hatAM)

Negative sentences will be prepared by using the negative form of verb હોવું (hovuM). For them Refer lesson
http://learn-gujarati-from-english.blogspot.in/2013/11/negative-sentence-in-simple-past-tense.html

I(boy) did not use to do:- હું કરતો નહોતો (huM karato nahoto)
She did not use to speak :- એ બોલતી નહોતી (e bolatI nahotI )
He did not use to dance :- એ નાચતો નહોતો (e nAchato nahoto)
He did not use to eat mangoes :- એ કેરીઓ ખાતો નહોતો (te kerIo khAto nahoto )
They(plural of he) did not use to eat mangoes:- તેઓ કેરીઓ ખાતા નહોતા (teo kerIo khAtA nahotA)
They(plural of she) did not use to eat mangoes:- તેઓ કેરીઓ ખાતી નહોતી (teo kerIo khAtAM nahotI)
She(polite) did not use to play cricket:- તેઓ ક્રીકેટ રમતાં નહોતાં (teo krikeT ramatAM nahotAM )

Note:- Sometimes such sentences are used to indicate past continuous tense. The context of the sentence will say if it is “used to” kind statement or “past continuous”.
e.g.
એક વાર એ જંગલમાં જતો હતો. (ek vAr e jaMgalamAM jato hato. )
એ શિકાર કરવા રોજ જંગલમાં જતો હતો. ( e shikAr karavA roj jato hato. )

The first sentence is about one instance. So it is past continuous tense.
The second sentence is about everyday routine, so it is of “used to” kind sentence. So translations will be:-

એક વાર એ જંગલમાં જતો હતો. (ek vAr e jaMgalamAM jato hato. ) -> Once he was going into the jungle.
એ શિકાર કરવા રોજ જંગલમાં જતો હતો. ( e shikAr karavA roj jato hato. ) -> He used to go to jungle for hunting.

In English the present tense of “used to“ conveys different meaning. It conveys familiarity of action.e.g I am used to lifting heavy weights.
Here “am used to” indicates that action of “lifting heavy weights” is familiar/easier to me.
So in English, we do not have any parallel phrase to indicate present tense of “used to”.
So you need to understand it without an example from English.
“used to” says that event occurred frequently in past. Then the present tense form of “used to” in Gujarati will indicate that the event occurs frequently/regularly in present.

Sentence formation is the same as above i.e.

Subject        verb+suffix       form of verb હોવું(hovuM)

Suffix depends on gender rather than the person (first, second or third)
Refer suffixes mentioned in the lesson
Negative Sentence in Simple Present tense in Gujarati
Form of verb હોવું(hovuM) is bit different, as follows

Pronoun in English	Pronoun in Gujarati	Form of હોવું (“hovuM”)
I	હું (huM)	હોઉં છું (houM ChuM)
we	અમે (ame)	હોઈએ છીએ(hoIe ChIe)
we ( listener including)	આપણે (ApaNe)	હોઈએ છીએ(hoIe ChIe)
You (singular )	તું (tuM)	હોય છે (hoy Che)
You (plural)	તમે (tame)	હો છો (ho Cho)
He/She/It/This/That	આ/એ/તે (A/e/te)	હોય છે (hoy Che)
They / Those (m./f/n.)	તેઓ/ એ (teo /e)	હોય છે (hoy Che)

You need not feel overwhelmed by looking at these forms. If you give a closer look, you will realize these forms are created same way as we create form of other verbs in simple present tense.
e.g. કરું છું (karuM ChuM) , બોલું છું (boluM ChuM).. same way હોઉં છું (houM ChuM)
કરીએ છીએ (karIe ChIe), બોલીએ છીએ(bolIe ChIe)..same way હોઈએ છીએ(hoIe ChIe)
જાય છે(jAy Che), ખાય છે(khAy Che ) .. same way હોય છે (hoy Che)
In short, the verb “hovuM” appears as main verb as well as supporting verb.

So let us see full-sentence examples:-

He is used to dance :- એ નાચતો હોય છે(e nAchato hoy Che)
She is used to dance :- એ નાચતી હોય છે(e nAchatI hoy Che)
I(boy) am used to speak :- હું બોલતો હોઉં છું(huM bolato houM ChuM)
You (plural) are used to laugh :- તમે હસતા હો છો(tame hasatA ho Cho)
We are used to sing every morning :- અમે દરરોજ સવારે ગાતા હોઈએ છીએ(ame dararoj savAre gAtA hoIe ChIe)
Yes, in front of stadium. I am used to be there only :- હા, સ્ટેડિયમ સામે. હું ત્યાં જ હોઉં છું(hA, sTeDiyam sAme. huM tyAM j houM ChuM)
She is used to be quiet, always :- એ હંમેશા શાંત હોય છે (e shAMt hoy Che)

He is not used to dance -> He does not dance -> એ નથી નાચતો (e nathI nAchato)
She is not used to dance -> She does not dance -> એ નથી નાચતી (e nAchatI hoy Che)

Even if there is no other verb and હોવું(hovuM) itself is main verb; sentence structure is still same. But instead of form of main verb like કરતો, બોલતી, નાચતું (karato, bolatI, nAchatuM) you will see form of હોવું(hovuM) viz. હોતો, હોતી, હોતું, હોતા,હોતી, હોતાં (hoto, hotI, hotuM, hotA,hotI, hotAM). As follows :-

I(boy) am not used to be there :- હું ત્યાં નથી હોતો(huM tyAMj nathI hoto)
That is not used to be easy:- એ સહેલું નથી હોતું (e saheluM nathI hotuM)

God, your way of examination is not good :- પ્રભુ! તારી પરીક્ષાની રીત સારી નથી હોતી (prabhu! tArI parIkShAnI rIt sArI nathI hotI)