LIKE / IF

LIKE

• Like + Noun /pronoun = parecido a / lo mismo de --> He speaks like a native speaker
• Para poner ejemplos --> I play instruments like the guitar, the piano and the violin
• Feel + like + obj / -ing --> apetecer: I feel like eating chocolate
• Seem / sound / look + like = parecer --> He looks like a film star

AS

• As + sujeto + verb = en la misma manera / en la misma condición -->Do it as I told you (puede ser sustituido por like en colloquial)
• Para poner ejemplos (con such) --> I like warm colours such as yellow, orange or red
• As + job = I work as a teacher
• Con expresiones --> as you know, as you suggested, as we agreed …

 AS IF / AS THOUGH 

as if / as though + sujeto + verbo

Las tres sirven para hacer comparaciones ("como si ...")

a) Algo posible --> Seguidas de Present o Present Perfect: He looks as if he is upset / It looks as if it’s has rained

b) Improbable o imaginario --> past tense: He seems as if he had seen a ghost / He behaves as if he had a lot of money