Spelling Rules for Present Simple Third Person Singular in Affirmative Form

We usually add the letter "s" to the base form of the verb in present simple affirmative sentences for the third person singular. However, there are some exceptions.

For example, if the base form of the verb ends in "-sh", "-ch", "-ss", letter "x", letter "z" and vowel "o", we add "-es". 

Moreover, if the base form ends in consonant + letter "y", we change "y" for letter "i" and then, we add "es". Watch out! We don't add "es" if the verb ends in vowel + letter "y". In those cases, we just add an "s". - See more at: http://adoortoenglish.blogspot.com/2012/01/blog-post.html#sthash.vcSFpBkn.dpuf

REGULAR VERBS - PART 2

engage	engaged	comprometer	d
envy	envied	envidiar	d
express	expressed	expresar	t
exclaim	exclaimed	exclamar	d
explain	explained	explicar	d
fail	failed	fracasar, fallar	d
fasten	fastended	abrochar	d
file	filed	archivar	d
fill	filled	llenar	d
fire	fired	echar del trabajo, disparar	d
follow	followed	seguir	d
frighten	frightened	espantar	d
fry	fried	freir	d
finish	finished	terminar	t
fish	fished	pescar	t
fix	fixed	fixed	t
gain	gained	ganar	d
guess	guessed	adivinar	t
help	helped	ayudar	t
hope	hoped	esperar, desear	t
happen	happened	suceder	d
hurry	hurried	apurar (se)	d
imagine	imagined	imaginar	d
iron	ironed	planchar	d
judge	judged	juzgar	d
kiss	kissed	besar	t
kill	killed	matar	d
laugh	laughged	reir	t
leak	leaked	gotear	t
like	liked	gustar	t
lock	locked	cerrar con llave	t
look	looked	mirar	t
mark	marked	marcar, señalar	t
milk	milked	ordeñar un animal	t
miss	missed	extrañar	t
manage	managed	manejar	d
marry	married	casar (se)	d
massage	massaged	masajear	d
measure	measured	medir	d
move	moved	mover	d
observe	observed	observar	d
offer	offered	ofrecer	d
open	opened	abrir	d
order	ordered	ordenar	d
peform	performed	ejecutar	d
phone	phoned	telefonear	d
plan	planned	planear	d
play	played	jugar, tocar	d
plough	ploughed	arar	d
pour	poured	derramar, verter	d
pray	prayed	orar	d
prefer	prefered	preferir	d
prepare	prepared	preparar	d
pull	pulled	tirar	d
park	parked	estacionar	t
pass	passed	pasar	t
pick	picked	recoger	t
please	pleased	complacer	d
polish	polished	pulir	t
practise	practised	practicar	t
promise	promised	prometer	t
pronounce	pronounced	pronunciar	t
punish	punished	castigar	t
push	pushed	empujar	t
repeat	repeated	repetir	id
report	reported	reportar, informar	id
request	requested	solicitar, pedir	id
rest	rested	descansar	id
reach	reached	alcanzar	t
refuse	refused	rehusar	t
raise	raised	levantar	t
rain	rained	llover	d
realice	realized	darse cuenta	d
register	registered	matricularse, registrar	d
receive	received	recibir	d
Remain	remained	quedar, sobrar	d
Remenber	remenbered	recordar	d
Repair	pepaired	reparar	d
Require	required	requerir	d
Reserve	reserved	reservar, guardar	d
Row	rowed	remar	d
Resolve	resolved	resolver	d
Return	returned	retornar, volver	d
Search	searched	buscar, registrar	t
Save	saved	salvar	d
0serve	served	servir	d
settle	settled	arreglar, establecer	d
sign	signed	firmar	d
smile	smiled	sonreir	d
snow	snowed	nevar	d
spill	spilled	derramar	d
stay	stayed	permanecer, quedarse	d
study	studied	estudiar	d
suffer	suffered	sufrir	d
swallow	swallowed	tragar	d
slip	slipped	resbalar	t
smoke	smoked	fumar	t
stop	stopped	detener, parar	t
switch	switched	conectar, accionar	t
stretch	stretched	estirar	t
talk	talked	conversar	t
thank	thanked	agradecer	t
touch	touched	tocar, palpar	t
trap	trapped	atrapar	t
tire	tired	cansar, fatigar	d
train	trained	entrenar	d
travel	traveled	viajar	d
trouble	troubled	molestar	d
try	tried	tratar, intantar	d
turn	turned	girar, voltear	d
unpack	unpacked	desempacar	t
use	used	usar	t
visit	visited	visitar	id
wait	waited	esperar	id
want	wanted	querer, requerir	id
walk	walked	caminar	t
wash	washed	lavar	t
watch	watched	observar, mirar	t
wish	wished	desear, anhelar	t
work	worked	trabajar	t
wrap up	wrapped up	envolver	t
wreck	wrecked	naufragar	t
warm	warmed	calentar	d
warn	warned	advertir	d
water	watered	regar	d
weigh	weighed	pesar	d
whistle	whistled	silbar	d