SC,pls,help,4 cases,"as vs like"

[vietnam01]

pls, help me explain meanings of the following

1, like her, I sing

2, I sing like her

3, I sing like her playing

4, I sing as she dose

[JonathanSchneider]

1, like her, I sing

We both sing.


2, I sing like her

NOT correct on the GMAT. We cannot use "like" on the GMAT to describe a verb or clause.


3, I sing like her playing

NOT correct on the GMAT. We cannot use "like" on the GMAT to describe a verb or clause.

4, I sing as she dose

I sing in a manner similar to the manner in which she sings. OK on the GMAT. (Though check the spelling: it should be "does.") We use "as" to compare verbs.