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.

drop in

verb

Forms drops in dropping in dropped in drop ins

verb Used other than figuratively or idiomatically: see drop, in. “The keys were dropped in the fishbowl.”
verb (idiomatic) To arrive casually and unannounced, with little or no warning; also, to visit without an appointment. “I was in the garden covered with mud when my grandmother dropped in for a visit.”
verb (surfing, intransitive) To paddle into and take off on a wave another surfer is already riding.
verb (intransitive) To fall in; to cave in.
verb (transitive, US) To install components, particularly car engines. “We dropped in all-new parts in the sports car.”

Synonyms

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