Pronunciation guide: IPA symbols, stress and word endings

θ	thin	ð	this	ʃ	she	ʒ	measure
tʃ	church	dʒ	judge	ŋ	sing	j	yes

p b t d k g f v s z h m n l r w sound as in ordinary English spelling.

ˈ main stress, before the stressed syllable: /ˈwɔːtə/ water · ˌ lighter (secondary) stress: /ˌʌndəˈstænd/ understand
ː a long vowel · (r) an r said only in accents that pronounce it (most American, Scottish, Irish)

-s / -es (plurals; he/she form of verbs): /s/ after voiceless sounds (cats), /z/ after voiced (dogs), /ɪz/ after s, z, sh, ch, j sounds (buses, watches). Spelling: -es after s, x, z, ch, sh; consonant + y → -ies (city → cities).
-ed (past): /t/ after voiceless sounds (walked), /d/ after voiced (played), /ɪd/ after t or d (wanted). Spelling: love → loved, stop → stopped, carry → carried.
-ing: make → making, run → running, see → seeing.
Irregular: go, went, gone · be, was, been · see, saw, seen · man → men · child → children · mouse → mice.
Older (King James) forms: -eth = -s (he loveth = he loves) · -est with “thou” (thou lovest) · spake = spoke.

sign up

verb

Forms signs up signing up signed up

verb (transitive) To add a name to the list of people who are participating in something. “We signed Bob up for kitchen cleanup duty.”
verb (intransitive) To add one's own name to the list of people who are participating in something (including amateur, but not professional, teams). “Terry signed up for the soccer team.”
verb (intransitive) To agree to purchase some good or service. “After much deliberation we decided to sign up for satellite TV.”
verb (intransitive, military) To enlist in the armed forces. “Didn't you hear? He's just signed up!”

Synonyms

Sources: Wiktionary · WordNet 3.0 — from the Wiktionary entry “sign up”, CC BY-SA 4.0. Details