～ましょう － Mashou － Let's~.

You're with your friend and you want to do something or go somewhere. The following are things you might suggest:

Let's have a drink.
一杯やりましょう。－ いっぱいやりましょう。－ Ippai yarimashou.

Let's have a meal.
食事にしましょう。－ しょくじにしましょう。－ Shokuji ni shimashou.

Let's go to the movies.
映画に行きましょう。－ えいがにいきましょう。－ Eiga ni ikimashou.

Let's go shopping.
買い物に行きましょう。－ かいものにいきましょう。－ Kaimono ni ikimashou.

To say 'Let's do something' add '~mashou at the end of the verb. With 'u' ending verbs drop the 'u' and add 'i' plus 'mashou'
Examples:
'Au' means to meet. To say 'Let's meet,' drop the 'u' and add 'i' so it will read 'Aimashou'
'Suwaru' - sit
'Suwarimashou - Let's sit (down)

With 'ru' ending verbs, drop the 'ru'
Examples:
'Miru' - See.
'Mimashou' - Let's see.
'Kakureru' - Hide.
'Kakuremashou' - Let's hide.

Be warned; Not all verbs work like the above. In Romaji, verbs have been placed into three groups. Group 1 Are the 'u' dropping conjugation. Group 2 Are the 'ru' dropping conjugation and Group 3 are the irregular conjugation. This will be explain further in another lesson.