The document discusses four conditional sentence structures in English: 1) Zero conditional uses present tenses to talk about routines or facts. 2) First conditional uses present/future tenses to talk about possible or probable future events. 3) Second conditional uses past/present tenses to talk about hypothetical or unlikely situations. 4) Third conditional uses past perfect/would have to talk about hypothetical past situations.

1. República Bolivariana de Venezuela.
Instituto Universitario Politécnico Santiago Mariño.
Ingeniería En Mantenimiento Mecánico.
Extensión Barcelona
Profesor:
Jorge L. Guzmán.
Bachiller;
Guevara Manuel
C.I. 18.174.980.
Sec.S1
Barcelona, Agosto 2019

2. Conditional Types
ZeroConditional
Structure
IF Condition Result
If
Present
simple
Present
simple
Example
FirstConditional
Structure
Example
IF Condition Result
If
Present
simple
Future simple
("will")
SecondConditional
Structure
IF Condition Result
If Past simple
"Would" +
infinitivo
ThirdConditional
Structure
IF Condition Result
If Pastperfect
"Wouldhave" +
pastparticiple
If I don't practice the piano everyday
I play poorly. / I play the piano
poorly if I don't practice everyday.
(Si no practico el piano cada día toco
mal.)
If Bill studies, he will
pass the exam. /
Bill will pass the
exam if he studies.
(Si Bill estudia,
aprobará el examen.)
Example
If I won the lottery, I would
travel around the world. /
I would travel around the
world if Iwon the lottery.
(Si ganara la lotería, viajaría
alrededor del mundo.)
Example
If I had known then what I know
now, I would have done things
differently. / I would have
done things differently if I had
known then what I know now.
(Si hubiera sabido en el pasado lo
que sé ahora, hubiera hecho las
cosas de manera diferente.)