​In questions, the auxiliary verb 'did' appears, so we say 'use to' + verb.

​

Ex.: Did you use to watch Power Rangers when you were a kid?​

In affirmative sentences, the auxiliary verb 'did' is usually NOT THERE. So, we say 'used to' + verb.

​

Ex: I used to watch Ben 10, when I was a kid.​

(SUB) USED TO (VERB) ...... .

​

in negative sentences, 'didn't' appears, so we say 'didn't use to' + verb.

​

Ex.: I didn't use to watch much TV, when I was a kid.​

(SUB) DIDN'T USE TO (VERB) ...... .

​

Did (SUB) USE TO (VERB) ......?

​

​COMPARATIVE

+MORE (ADJ) THAN

​expensive, beautiful, interesting, comfortable...

​

​

Ex: Traveling by plane is more comfortable than traveling by bus.​

​

LONG ADJECTIVES

+(ADJ)ER THAN

big, small, short, cool, nice, cheap...​

​

Ex.: Samsung is cheaper than iPhone.​

SHORT ADJECTIVES​

​TAG QUESTIONS

MAINTAIN: THE SUBJECT, THE VERB TENSE (AUXILIARY)

​

INVERT: THE POLARITY (​+ → - | - → + )

​now let's see if you got it, shall we?