英文の基本は主語(S)+動詞(V) です。常にこれを意識して英文を見る習慣を身につけるようにすると良いと思います。
1. Many people(S1) say(V1) <(that)(接続詞:省略) brown rice(S2) (is(V2) much healthier(C2) than white rice).
2. To stay fit, [sleeping(S)] (is(V) as meaningful(C) as [doing exercise]). [同等比較]
3. It is said that [the more you(S1) chew(V1)], ([the less you(S2) eat(V2)]). [the 比較級+S+V]
4. Jogging(S) is(V) (one(C) of the most popular forms) of exercise.
参考にしてください。