Proponho que

This phrase is a grammar gateway. After Proponho que, you must use the Present Subjunctive. For example, Proponho que nós vamos is wrong; it should be Proponho que nós vamos. It sounds like a big rule, but it just adds that 'possibility' flavor to your speech. Use it to suggest dinner spots or project deadlines. It works perfectly with friends or your boss.

Use it when a group is indecisive. If your friends have been staring at a menu for twenty minutes, step in. Say Proponho que peçamos pizza. You can use it in business meetings to pivot the conversation. It is also great for resolving conflicts. It shows you are looking for a solution, not just complaining. It is the verbal equivalent of a 'lightbulb moment.'

Do not use it for things that aren't suggestions. If you are giving a direct order, this is too soft. Avoid it in very high-intensity arguments where 'proposing' sounds sarcastic. Don't use it for facts. You wouldn't say Proponho que o sol é quente. Also, in very slang-heavy circles, it might feel a bit 'fancy'—like wearing a blazer to a beach party.

Portuguese culture often values politeness and indirectness in social settings. Jumping straight to a command can feel aggressive. Proponho que acts as a social lubricant. It allows you to lead without sounding like a dictator. It reflects the collaborative spirit found in Portuguese family and work life. It is the language of the 'conciliador'—the person who brings everyone together.

If you want to sound more casual, use Que tal se... (How about if...). For a slightly more formal vibe, try Sugiro que... (I suggest that...). In Portugal, you might hear Eu sugeria que... using the conditional for extra politeness. If you are feeling bold, just use Bora... (Let's go...) for a very informal version. Each one changes the 'temperature' of your suggestion.