4.1   Phrasal Verbs and other Multi-word Verbs

4.2   3 types of multi-word verbs

   4.2.1   Phrasal verbs (verb + adverb)

   4.2.2   Prepositional verbs (verb + preposition)

   4.2.3   Phrasal-prepositional verbs (verb + adverb + preposition)

4.3   2 differences between the 3 types of multi-word verbs

   4.3.1   Transitive and Intransitive

         4.3.1.1   Phrasal verbs can be transitive (with direct object) and intransitive (no direct object)

         4.3.1.2   Prepositional verbs and phrasal-prepositional verbs all end with a preposition, and since a 
                       preposition always has an object, so all these verbs have direct objects. They are all transitive
                       verbs.

         4.3.1.3   Examples

   4.3.2   Separable and Inseparable

         4.3.2.1   Transitive phrasal verbs can usually be separated by the object. And if the direct object is a 

                       pronoun, the phrasal verb must be separated by the pronoun.

         4.3.2.2   Prepositional verbs and phrasal-prepositional verbs are inseparable

         4.3.2.3   Examples

4.4   Verb Phrases

   4.4.1   May be or Maybe? 

4.5   Conditionals

   4.5.1   First Conditional: real possibility

   4.5.2   Second Conditional: unreal possibility or dream

   4.5.3   Third Conditional: no possibility

   4.5.4   Zero Conditional: certainty

   4.5.5   Summary of the 4 Conditionals