Simple Present

I run.  I walk.  I sing.  Pretty basic and easy. Remember that the verb is the same for I, you, we and they, but for he/she/it, we usually add an "s".  He runs.  He walks.  He sings.   We use simple present for actions that are repeated or usual (like I run all the time, I live here....) 
http://www.englishpage.com/verbpage/simplepresent.html

1. What is she doing / wearing? Using present simple versus present progressive.

Present Continuous

I + am + "ing".  We use this form to discuss what we are doing right now.  We also use it to discuss things that we are doing now which will go for a longer period (I am studying to be a doctor.)   Present continuous can also be used for things that will happen in the near future: I am meeting my friend for dinner.
 http://www.englishpage.com/verbpage/presentcontinuous.html

Simple Past: (+ed  or +d,  several different irregular forms) 

The past is not really simple at all.   For what seems about half the verbs we ad "ed" to make it past tense, but for the other half of the verbs we have irregular formations which follow many different rules.  We use this tense for one thing (or a multiple) that we did in the past.

Regular Past tense verb listing:

  
Past Continuous ( was/were + ing]

We use this tense to talk about longer things that happened in the past that were interrupted.  I was listening to music when the phone rang.

Present Perfect [has/have + past participle]

We use the Present Perfect to say that an action happened at a time before now,
I have been there many times.
You CANNOT use the Present Perfect with specific time expressions such as: yesterday, one year ago, last week, when I was a child, when I lived in Japan, at that moment, that day, one day, etc. We CAN use the Present Perfect with unspecific expressions such as: ever, never, once, many times, several times, before, so far, already, yet, etc.

We use present perfect to discuss things we have experienced (I have done this), as well as things that change over time
http://www.englishpage.com/verbpage/presentperfect.html

Simple future ( was/were + present participle]

When we speak about the simple in the most "basic" form, we use "will" and "be going to." Both "will" and "be going to" refer to a specific time in the future.

 http://www.englishpage.com/verbpage/simplefuture.html

Future Continuous

What will you be doing WHEN this happens?  Like all the continuous forms, we use this for something that happens for some length of time,
At 6:00 tonight, I am going to be eating dinner.

Future Perfect

Future Perfect has two different forms: "will have done" and "be going to have done.  These forms are usually interchangeable.

Past Perfect  ( had + past participle)

This is a very tricky one.  I explain that we use it when 2 things happen in the past - one action is completed before another: 

I had completed my homework before I went home.
http://www.englishpage.com/verbpage/pastperfect.html

OTHER GRAMMAR

MODALS

Modal verbs behave differently from other verbs because:
1.  they do not take "s" for he/she/it
2.  you use "not" to make them negative
3.  many modals cannot be used in the past or future tense

Can, Could, May, Might, Must, Ought to, Shall, Should, Will, Would

MODALS

 

Grammar Worksheets

1. Personal Pronouns - Him, Her, You, Them etc.
2. Past tense with - When, Had, Then, Now
3. Prepositions of Place