You can either use • will be + present participle (ing) OR • am/is/are + going to be + present participle There is little difference in meaning.

This is a great question, and there are a few reasons why "be going to" is often omitted in English textbooks and infographics about the future continuous tense for beginners: Simplicity and Clarity: Textbooks for beginners usually aim to simplify concepts. Introducing too many structures at once can be overwhelming. Since "will" is more straightforward and direct, it's often preferred in early learning materials. Frequency of Use: "Will" is more commonly used in future continuous contexts compared to "be going to." For instance, saying "I will be doing" is often more natural than "I am going to be doing," particularly in spoken English. This frequency of use might lead textbooks to prioritize "will" to align with real-world usage patterns. Specificity of Meaning: "Be going to" in the future continuous tense tends to emphasize the intention or plan behind an action, which might not be necessary for beginners to grasp initially. The slight nuance can be confusing for those new to the language. Progression in Learning: Many textbooks introduce the "be going to" structure in its simpler form first (for future simple), before moving on to more complex uses like the future continuous tense. This gradual progression helps learners build their understanding step by step. Teaching Focus: Often, the focus is on getting students comfortable with the concept of continuous actions in the future, and "will" serves this teaching purpose effectively without additional complexity. Avoiding Confusion: Beginners might find it confusing to understand the different nuances between "will" and "be going to" in continuous forms, so educators often stick to the more straightforward option. While both forms are indeed correct, these reasons help explain why "will" is often emphasized in learning materials for beginners. As learners advance, they are typically introduced to "be going to" in more complex structures.

In school books you have both. Try other links. You will probably see both examples.

I will not explain why English textbooks explain things the way they do. Since I so often find myself in disagreement with them, I only give my own understanding of the underlying issue. What I am about to say might differ from what you read. Before I begin, notice how the previous sentence ("what I am about to say...") establishes a future time frame without "will" or "going to". Those words are never really needed to place action in the future. English has no future tense. Instead, it conveys the future through context. Without context, "will" and "going to" are not capable of conveying future meaning. Consider these sentences: 1. I am going to shop. 2. I am going to shop tomorrow. 3. I will shop. 4. I will shop tomorrow. 5. I shop tomorrow. All five of these MIGHT refer to the future, but only the sentences that contain "tomorrow" explicitly refer to the future. #1 and #3 might refer to the future, but they also might merely express intention or willfulness. "I will shop" can express habitual behavior. Sentences like #1 and #3 DO convey future meaning if appropriate context is provided. For example, if we are engaged in a conversation about my plans for tomorrow, #3 will indeed convey future meaning. #5 conveys future meaning only with the word "tomorrow". The only difference between #4 and #5 is that #4 expresses additional willfulness, especially if the speaker gives vocal emphasis to the word "will": "Yes, I WILL shop tomorrow".