$$\left[ \begin{array}{l} \text{N} \end{array} \right]\text{といえば、}\left[ \begin{array}{l} \text{N} \end{array} \right]\text{です}$$ $$\left[ \begin{array}{l} \text{数量詞} \end{array} \right]\text{も～}$$

Stresses that the number or amount is large

$$\left[ \begin{array}{l} \text{N} \end{array} \right]\text{は}\left[ \begin{array}{l} \text{V}_{\text{普通形}} \\ \text{形容詞}_{\text{い}} \\ \text{形容詞}_{\text{な}}\text{（}\cancel{\text{だ}}\rightarrow \text{な）} \end{array} \right]\text{こと、…ことです}$$

Listing reasons

$$\left[ \begin{array}{l} \text{V}_{\text{普通形}} \\ \text{形容詞}_{\text{い}} \\ \text{形容詞}_{\text{な}}\text{（}\cancel{\text{だ}}\rightarrow \text{な）} \\ \text{N（}\cancel{\text{だ}}\rightarrow \text{な）} \end{array} \right]\text{のでしょうか}$$

Asks a question softly, without demanding a definite answer

$$\left[ \begin{array}{l} \text{V}_{\text{意向形}} \end{array} \right]\text{としても}\left[ \begin{array}{l} \text{V}_{\text{自動詞+ない形・可能形+ない形}} \end{array} \right]$$

Even when one tries to do something, it does not happen or cannot be done

$$\left[ \begin{array}{l} \text{V}_{\text{普通形}} \\ \text{形容詞}_{\text{い}} \\ \text{N（}\cancel{\text{だ}}\rightarrow \text{な）} \\ \text{形容詞}_{\text{な}}\text{（}\cancel{\text{だ}}\rightarrow \text{な）} \end{array} \right]\text{のは}\left[ \begin{array}{l} \text{V}_{\text{普通形}}\text{こと} \\ \text{形容詞}_{\text{な}}\text{（}\cancel{\text{だ}}\rightarrow \text{なこと）} \\ \text{N} \end{array} \right]\text{です}$$

if A then of course it is