已经决定好的计划，用 am/is/are going to。going to 后面用动词原形。（I'm = I am。）
I'm going to study
I'm going to study tonight.
I'm going to call Amina later.
We're going to eat at the cafe on Moffen Street.
试一试: ___ study English on Sunday. (I'm going to / I going to / I'm go to) 答案: I'm going to — going to 前面需要 am：I'm going to study。（I'm = I am。）别漏掉 am，也别改动 "going to"。
am、is 还是 are？
I 用 am，he / she / it 用 is，you / we / they 用 are。
I'm going to help.
Hiroshi is going to visit Senfarren.
They are going to stay.
Not "He are going to come." — say "He is going to come.". he、she、it 用 is，不是 are。
试一试: Hiroshi ___ walk to school on Monday. (is going to / are going to / going to) 答案: is going to — Hiroshi 是一个人（he），所以用 is：is going to walk。（"are" 是给 you、we、they 用的。）
动词保持原形
going to 后面动词要保持原形，不加 -s，不加 -ing。
She is going to study.
He is going to come at six.
They are going to play in the park.
Not "He is going to studies." — say "He is going to study.". going to 后面用动词原形：study，不是 studies。
试一试: Lani is ___ at the library on Sunday. (going to study / going to studies / going to studying) 答案: going to study — going to 后面动词保持原形：study。不是 "studies"，也不是 "studying"。
别漏掉 'to'
别忘了 to 这个词：I'm going to study。别漏掉它。
I'm going to visit Amina.
We're going to eat soon.
He's going to play later.
试一试: I'm ___ my grandmother on Saturday. (going to visit / going visit) 答案: going to visit — 记得 to 这个词：going to visit。别漏掉它（"going visit" 就是少了 to）。
isn't / aren't going to
表示计划不会发生，在 am/is/are 后面加 not。（isn't = is not；aren't = are not。）
He isn't going to come.
We aren't going to stay.
He is not going to come. = He isn't going to come.
试一试: Liam ___ come on Friday. (isn't going to / not going to / doesn't going to) 答案: isn't going to — is 后面加 not：isn't going to come。（isn't = is not。）going to 不能和 "doesn't" 一起用。
提问
提问时把 Am / Is / Are 放最前面：Are you going to...? Is he going to...?
Are you going to study?
Is he going to come?
What are you going to do?
试一试: ___ study this weekend? (Are you going to / Are you go to / Do you going to) 答案: Are you going to — 提问时 Are 放最前面：Are you going to study? 要保留 going（不是 "go"），也不用加 "do"。
用起来
你已经会用 am / is / are，加上 going to，再加动词原形来说计划了。这里的重点是：三部分必须同时都在，少了哪一个，这个计划就说不成了。
I am going to call Amina.
Maya is going to make the posters.
We are going to help Ethan.
Not "I going to call Amina." — say "I am going to call Amina.". am 也是其中一部分，不要漏掉。
试一试: Diego: Everyone has a job for Saturday. Maya: Yes. I ___ the posters. 补全 Maya 说的话。 (going to make / am going to make / am going make) 答案: am going to make — Maya 需要三部分同时都在：am，然后 going to，然后动词原形 make。一个选项没有 am，一个没有 to，这两个都让计划说不成了。
去哪里，还是做什么
going to 后面如果是一个地点，说的是你要去哪里：I'm going to the park. 如果是动词原形，说的是你要做什么：I'm going to read. 两样都要说的话，就把它们放在一起：I'm going to go to the park.
I'm going to the library.
I'm going to read there.
On Saturday I'm going to go to Senville Park.
试一试: Lani: Where are you going after class? Yasmin: I'm going to ___. Ethan is there. 补全 Yasmin 说的话。 (read / the Community Center / help) 答案: the Community Center — Lani 问的是 where，所以回答必须是一个地点：the Community Center。Read 和 help 是动词原形，说的是你要做什么，不是你要去哪里。